diff options
Diffstat (limited to 'media/ffvpx/libavcodec/vp8.c')
| -rw-r--r-- | media/ffvpx/libavcodec/vp8.c | 2988 |
1 files changed, 2988 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/vp8.c b/media/ffvpx/libavcodec/vp8.c new file mode 100644 index 0000000000..3ddc349a4d --- /dev/null +++ b/media/ffvpx/libavcodec/vp8.c @@ -0,0 +1,2988 @@ +/* + * VP7/VP8 compatible video decoder + * + * Copyright (C) 2010 David Conrad + * Copyright (C) 2010 Ronald S. Bultje + * Copyright (C) 2010 Fiona Glaser + * Copyright (C) 2012 Daniel Kang + * Copyright (C) 2014 Peter Ross + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/imgutils.h" + +#include "avcodec.h" +#include "hwaccel.h" +#include "internal.h" +#include "mathops.h" +#include "rectangle.h" +#include "thread.h" +#include "vp8.h" +#include "vp8data.h" + +#if ARCH_ARM +# include "arm/vp8.h" +#endif + +#if CONFIG_VP7_DECODER && CONFIG_VP8_DECODER +#define VPX(vp7, f) (vp7 ? vp7_ ## f : vp8_ ## f) +#elif CONFIG_VP7_DECODER +#define VPX(vp7, f) vp7_ ## f +#else // CONFIG_VP8_DECODER +#define VPX(vp7, f) vp8_ ## f +#endif + +static void free_buffers(VP8Context *s) +{ + int i; + if (s->thread_data) + for (i = 0; i < MAX_THREADS; i++) { +#if HAVE_THREADS + pthread_cond_destroy(&s->thread_data[i].cond); + pthread_mutex_destroy(&s->thread_data[i].lock); +#endif + av_freep(&s->thread_data[i].filter_strength); + } + av_freep(&s->thread_data); + av_freep(&s->macroblocks_base); + av_freep(&s->intra4x4_pred_mode_top); + av_freep(&s->top_nnz); + av_freep(&s->top_border); + + s->macroblocks = NULL; +} + +static int vp8_alloc_frame(VP8Context *s, VP8Frame *f, int ref) +{ + int ret; + if ((ret = ff_thread_get_buffer(s->avctx, &f->tf, + ref ? AV_GET_BUFFER_FLAG_REF : 0)) < 0) + return ret; + if (!(f->seg_map = av_buffer_allocz(s->mb_width * s->mb_height))) + goto fail; + if (s->avctx->hwaccel) { + const AVHWAccel *hwaccel = s->avctx->hwaccel; + if (hwaccel->frame_priv_data_size) { + f->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size); + if (!f->hwaccel_priv_buf) + goto fail; + f->hwaccel_picture_private = f->hwaccel_priv_buf->data; + } + } + return 0; + +fail: + av_buffer_unref(&f->seg_map); + ff_thread_release_buffer(s->avctx, &f->tf); + return AVERROR(ENOMEM); +} + +static void vp8_release_frame(VP8Context *s, VP8Frame *f) +{ + av_buffer_unref(&f->seg_map); + av_buffer_unref(&f->hwaccel_priv_buf); + f->hwaccel_picture_private = NULL; + ff_thread_release_buffer(s->avctx, &f->tf); +} + +#if CONFIG_VP8_DECODER +static int vp8_ref_frame(VP8Context *s, VP8Frame *dst, VP8Frame *src) +{ + int ret; + + vp8_release_frame(s, dst); + + if ((ret = ff_thread_ref_frame(&dst->tf, &src->tf)) < 0) + return ret; + if (src->seg_map && + !(dst->seg_map = av_buffer_ref(src->seg_map))) { + vp8_release_frame(s, dst); + return AVERROR(ENOMEM); + } + if (src->hwaccel_picture_private) { + dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf); + if (!dst->hwaccel_priv_buf) + return AVERROR(ENOMEM); + dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data; + } + + return 0; +} +#endif /* CONFIG_VP8_DECODER */ + +static void vp8_decode_flush_impl(AVCodecContext *avctx, int free_mem) +{ + VP8Context *s = avctx->priv_data; + int i; + + for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) + vp8_release_frame(s, &s->frames[i]); + memset(s->framep, 0, sizeof(s->framep)); + + if (free_mem) + free_buffers(s); +} + +static void vp8_decode_flush(AVCodecContext *avctx) +{ + vp8_decode_flush_impl(avctx, 0); +} + +static VP8Frame *vp8_find_free_buffer(VP8Context *s) +{ + VP8Frame *frame = NULL; + int i; + + // find a free buffer + for (i = 0; i < 5; i++) + if (&s->frames[i] != s->framep[VP56_FRAME_CURRENT] && + &s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] && + &s->frames[i] != s->framep[VP56_FRAME_GOLDEN] && + &s->frames[i] != s->framep[VP56_FRAME_GOLDEN2]) { + frame = &s->frames[i]; + break; + } + if (i == 5) { + av_log(s->avctx, AV_LOG_FATAL, "Ran out of free frames!\n"); + abort(); + } + if (frame->tf.f->buf[0]) + vp8_release_frame(s, frame); + + return frame; +} + +static enum AVPixelFormat get_pixel_format(VP8Context *s) +{ + enum AVPixelFormat pix_fmts[] = { +#if CONFIG_VP8_VAAPI_HWACCEL + AV_PIX_FMT_VAAPI, +#endif +#if CONFIG_VP8_NVDEC_HWACCEL + AV_PIX_FMT_CUDA, +#endif + AV_PIX_FMT_YUV420P, + AV_PIX_FMT_NONE, + }; + + return ff_get_format(s->avctx, pix_fmts); +} + +static av_always_inline +int update_dimensions(VP8Context *s, int width, int height, int is_vp7) +{ + AVCodecContext *avctx = s->avctx; + int i, ret; + + if (width != s->avctx->width || ((width+15)/16 != s->mb_width || (height+15)/16 != s->mb_height) && s->macroblocks_base || + height != s->avctx->height) { + vp8_decode_flush_impl(s->avctx, 1); + + ret = ff_set_dimensions(s->avctx, width, height); + if (ret < 0) + return ret; + } + + if (!s->actually_webp && !is_vp7) { + s->pix_fmt = get_pixel_format(s); + if (s->pix_fmt < 0) + return AVERROR(EINVAL); + avctx->pix_fmt = s->pix_fmt; + } + + s->mb_width = (s->avctx->coded_width + 15) / 16; + s->mb_height = (s->avctx->coded_height + 15) / 16; + + s->mb_layout = is_vp7 || avctx->active_thread_type == FF_THREAD_SLICE && + avctx->thread_count > 1; + if (!s->mb_layout) { // Frame threading and one thread + s->macroblocks_base = av_mallocz((s->mb_width + s->mb_height * 2 + 1) * + sizeof(*s->macroblocks)); + s->intra4x4_pred_mode_top = av_mallocz(s->mb_width * 4); + } else // Sliced threading + s->macroblocks_base = av_mallocz((s->mb_width + 2) * (s->mb_height + 2) * + sizeof(*s->macroblocks)); + s->top_nnz = av_mallocz(s->mb_width * sizeof(*s->top_nnz)); + s->top_border = av_mallocz((s->mb_width + 1) * sizeof(*s->top_border)); + s->thread_data = av_mallocz(MAX_THREADS * sizeof(VP8ThreadData)); + + if (!s->macroblocks_base || !s->top_nnz || !s->top_border || + !s->thread_data || (!s->intra4x4_pred_mode_top && !s->mb_layout)) { + free_buffers(s); + return AVERROR(ENOMEM); + } + + for (i = 0; i < MAX_THREADS; i++) { + s->thread_data[i].filter_strength = + av_mallocz(s->mb_width * sizeof(*s->thread_data[0].filter_strength)); + if (!s->thread_data[i].filter_strength) { + free_buffers(s); + return AVERROR(ENOMEM); + } +#if HAVE_THREADS + pthread_mutex_init(&s->thread_data[i].lock, NULL); + pthread_cond_init(&s->thread_data[i].cond, NULL); +#endif + } + + s->macroblocks = s->macroblocks_base + 1; + + return 0; +} + +static int vp7_update_dimensions(VP8Context *s, int width, int height) +{ + return update_dimensions(s, width, height, IS_VP7); +} + +static int vp8_update_dimensions(VP8Context *s, int width, int height) +{ + return update_dimensions(s, width, height, IS_VP8); +} + + +static void parse_segment_info(VP8Context *s) +{ + VP56RangeCoder *c = &s->c; + int i; + + s->segmentation.update_map = vp8_rac_get(c); + s->segmentation.update_feature_data = vp8_rac_get(c); + + if (s->segmentation.update_feature_data) { + s->segmentation.absolute_vals = vp8_rac_get(c); + + for (i = 0; i < 4; i++) + s->segmentation.base_quant[i] = vp8_rac_get_sint(c, 7); + + for (i = 0; i < 4; i++) + s->segmentation.filter_level[i] = vp8_rac_get_sint(c, 6); + } + if (s->segmentation.update_map) + for (i = 0; i < 3; i++) + s->prob->segmentid[i] = vp8_rac_get(c) ? vp8_rac_get_uint(c, 8) : 255; +} + +static void update_lf_deltas(VP8Context *s) +{ + VP56RangeCoder *c = &s->c; + int i; + + for (i = 0; i < 4; i++) { + if (vp8_rac_get(c)) { + s->lf_delta.ref[i] = vp8_rac_get_uint(c, 6); + + if (vp8_rac_get(c)) + s->lf_delta.ref[i] = -s->lf_delta.ref[i]; + } + } + + for (i = MODE_I4x4; i <= VP8_MVMODE_SPLIT; i++) { + if (vp8_rac_get(c)) { + s->lf_delta.mode[i] = vp8_rac_get_uint(c, 6); + + if (vp8_rac_get(c)) + s->lf_delta.mode[i] = -s->lf_delta.mode[i]; + } + } +} + +static int setup_partitions(VP8Context *s, const uint8_t *buf, int buf_size) +{ + const uint8_t *sizes = buf; + int i; + int ret; + + s->num_coeff_partitions = 1 << vp8_rac_get_uint(&s->c, 2); + + buf += 3 * (s->num_coeff_partitions - 1); + buf_size -= 3 * (s->num_coeff_partitions - 1); + if (buf_size < 0) + return -1; + + for (i = 0; i < s->num_coeff_partitions - 1; i++) { + int size = AV_RL24(sizes + 3 * i); + if (buf_size - size < 0) + return -1; + s->coeff_partition_size[i] = size; + + ret = ff_vp56_init_range_decoder(&s->coeff_partition[i], buf, size); + if (ret < 0) + return ret; + buf += size; + buf_size -= size; + } + + s->coeff_partition_size[i] = buf_size; + ff_vp56_init_range_decoder(&s->coeff_partition[i], buf, buf_size); + + return 0; +} + +static void vp7_get_quants(VP8Context *s) +{ + VP56RangeCoder *c = &s->c; + + int yac_qi = vp8_rac_get_uint(c, 7); + int ydc_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi; + int y2dc_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi; + int y2ac_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi; + int uvdc_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi; + int uvac_qi = vp8_rac_get(c) ? vp8_rac_get_uint(c, 7) : yac_qi; + + s->qmat[0].luma_qmul[0] = vp7_ydc_qlookup[ydc_qi]; + s->qmat[0].luma_qmul[1] = vp7_yac_qlookup[yac_qi]; + s->qmat[0].luma_dc_qmul[0] = vp7_y2dc_qlookup[y2dc_qi]; + s->qmat[0].luma_dc_qmul[1] = vp7_y2ac_qlookup[y2ac_qi]; + s->qmat[0].chroma_qmul[0] = FFMIN(vp7_ydc_qlookup[uvdc_qi], 132); + s->qmat[0].chroma_qmul[1] = vp7_yac_qlookup[uvac_qi]; +} + +static void vp8_get_quants(VP8Context *s) +{ + VP56RangeCoder *c = &s->c; + int i, base_qi; + + s->quant.yac_qi = vp8_rac_get_uint(c, 7); + s->quant.ydc_delta = vp8_rac_get_sint(c, 4); + s->quant.y2dc_delta = vp8_rac_get_sint(c, 4); + s->quant.y2ac_delta = vp8_rac_get_sint(c, 4); + s->quant.uvdc_delta = vp8_rac_get_sint(c, 4); + s->quant.uvac_delta = vp8_rac_get_sint(c, 4); + + for (i = 0; i < 4; i++) { + if (s->segmentation.enabled) { + base_qi = s->segmentation.base_quant[i]; + if (!s->segmentation.absolute_vals) + base_qi += s->quant.yac_qi; + } else + base_qi = s->quant.yac_qi; + + s->qmat[i].luma_qmul[0] = vp8_dc_qlookup[av_clip_uintp2(base_qi + s->quant.ydc_delta, 7)]; + s->qmat[i].luma_qmul[1] = vp8_ac_qlookup[av_clip_uintp2(base_qi, 7)]; + s->qmat[i].luma_dc_qmul[0] = vp8_dc_qlookup[av_clip_uintp2(base_qi + s->quant.y2dc_delta, 7)] * 2; + /* 101581>>16 is equivalent to 155/100 */ + s->qmat[i].luma_dc_qmul[1] = vp8_ac_qlookup[av_clip_uintp2(base_qi + s->quant.y2ac_delta, 7)] * 101581 >> 16; + s->qmat[i].chroma_qmul[0] = vp8_dc_qlookup[av_clip_uintp2(base_qi + s->quant.uvdc_delta, 7)]; + s->qmat[i].chroma_qmul[1] = vp8_ac_qlookup[av_clip_uintp2(base_qi + s->quant.uvac_delta, 7)]; + + s->qmat[i].luma_dc_qmul[1] = FFMAX(s->qmat[i].luma_dc_qmul[1], 8); + s->qmat[i].chroma_qmul[0] = FFMIN(s->qmat[i].chroma_qmul[0], 132); + } +} + +/** + * Determine which buffers golden and altref should be updated with after this frame. + * The spec isn't clear here, so I'm going by my understanding of what libvpx does + * + * Intra frames update all 3 references + * Inter frames update VP56_FRAME_PREVIOUS if the update_last flag is set + * If the update (golden|altref) flag is set, it's updated with the current frame + * if update_last is set, and VP56_FRAME_PREVIOUS otherwise. + * If the flag is not set, the number read means: + * 0: no update + * 1: VP56_FRAME_PREVIOUS + * 2: update golden with altref, or update altref with golden + */ +static VP56Frame ref_to_update(VP8Context *s, int update, VP56Frame ref) +{ + VP56RangeCoder *c = &s->c; + + if (update) + return VP56_FRAME_CURRENT; + + switch (vp8_rac_get_uint(c, 2)) { + case 1: + return VP56_FRAME_PREVIOUS; + case 2: + return (ref == VP56_FRAME_GOLDEN) ? VP56_FRAME_GOLDEN2 : VP56_FRAME_GOLDEN; + } + return VP56_FRAME_NONE; +} + +static void vp78_reset_probability_tables(VP8Context *s) +{ + int i, j; + for (i = 0; i < 4; i++) + for (j = 0; j < 16; j++) + memcpy(s->prob->token[i][j], vp8_token_default_probs[i][vp8_coeff_band[j]], + sizeof(s->prob->token[i][j])); +} + +static void vp78_update_probability_tables(VP8Context *s) +{ + VP56RangeCoder *c = &s->c; + int i, j, k, l, m; + + for (i = 0; i < 4; i++) + for (j = 0; j < 8; j++) + for (k = 0; k < 3; k++) + for (l = 0; l < NUM_DCT_TOKENS-1; l++) + if (vp56_rac_get_prob_branchy(c, vp8_token_update_probs[i][j][k][l])) { + int prob = vp8_rac_get_uint(c, 8); + for (m = 0; vp8_coeff_band_indexes[j][m] >= 0; m++) + s->prob->token[i][vp8_coeff_band_indexes[j][m]][k][l] = prob; + } +} + +#define VP7_MVC_SIZE 17 +#define VP8_MVC_SIZE 19 + +static void vp78_update_pred16x16_pred8x8_mvc_probabilities(VP8Context *s, + int mvc_size) +{ + VP56RangeCoder *c = &s->c; + int i, j; + + if (vp8_rac_get(c)) + for (i = 0; i < 4; i++) + s->prob->pred16x16[i] = vp8_rac_get_uint(c, 8); + if (vp8_rac_get(c)) + for (i = 0; i < 3; i++) + s->prob->pred8x8c[i] = vp8_rac_get_uint(c, 8); + + // 17.2 MV probability update + for (i = 0; i < 2; i++) + for (j = 0; j < mvc_size; j++) + if (vp56_rac_get_prob_branchy(c, vp8_mv_update_prob[i][j])) + s->prob->mvc[i][j] = vp8_rac_get_nn(c); +} + +static void update_refs(VP8Context *s) +{ + VP56RangeCoder *c = &s->c; + + int update_golden = vp8_rac_get(c); + int update_altref = vp8_rac_get(c); + + s->update_golden = ref_to_update(s, update_golden, VP56_FRAME_GOLDEN); + s->update_altref = ref_to_update(s, update_altref, VP56_FRAME_GOLDEN2); +} + +static void copy_chroma(AVFrame *dst, AVFrame *src, int width, int height) +{ + int i, j; + + for (j = 1; j < 3; j++) { + for (i = 0; i < height / 2; i++) + memcpy(dst->data[j] + i * dst->linesize[j], + src->data[j] + i * src->linesize[j], width / 2); + } +} + +static void fade(uint8_t *dst, ptrdiff_t dst_linesize, + const uint8_t *src, ptrdiff_t src_linesize, + int width, int height, + int alpha, int beta) +{ + int i, j; + for (j = 0; j < height; j++) { + const uint8_t *src2 = src + j * src_linesize; + uint8_t *dst2 = dst + j * dst_linesize; + for (i = 0; i < width; i++) { + uint8_t y = src2[i]; + dst2[i] = av_clip_uint8(y + ((y * beta) >> 8) + alpha); + } + } +} + +static int vp7_fade_frame(VP8Context *s, VP56RangeCoder *c) +{ + int alpha = (int8_t) vp8_rac_get_uint(c, 8); + int beta = (int8_t) vp8_rac_get_uint(c, 8); + int ret; + + if (c->end <= c->buffer && c->bits >= 0) + return AVERROR_INVALIDDATA; + + if (!s->keyframe && (alpha || beta)) { + int width = s->mb_width * 16; + int height = s->mb_height * 16; + AVFrame *src, *dst; + + if (!s->framep[VP56_FRAME_PREVIOUS] || + !s->framep[VP56_FRAME_GOLDEN]) { + av_log(s->avctx, AV_LOG_WARNING, "Discarding interframe without a prior keyframe!\n"); + return AVERROR_INVALIDDATA; + } + + dst = + src = s->framep[VP56_FRAME_PREVIOUS]->tf.f; + + /* preserve the golden frame, write a new previous frame */ + if (s->framep[VP56_FRAME_GOLDEN] == s->framep[VP56_FRAME_PREVIOUS]) { + s->framep[VP56_FRAME_PREVIOUS] = vp8_find_free_buffer(s); + if ((ret = vp8_alloc_frame(s, s->framep[VP56_FRAME_PREVIOUS], 1)) < 0) + return ret; + + dst = s->framep[VP56_FRAME_PREVIOUS]->tf.f; + + copy_chroma(dst, src, width, height); + } + + fade(dst->data[0], dst->linesize[0], + src->data[0], src->linesize[0], + width, height, alpha, beta); + } + + return 0; +} + +static int vp7_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_size) +{ + VP56RangeCoder *c = &s->c; + int part1_size, hscale, vscale, i, j, ret; + int width = s->avctx->width; + int height = s->avctx->height; + + if (buf_size < 4) { + return AVERROR_INVALIDDATA; + } + + s->profile = (buf[0] >> 1) & 7; + if (s->profile > 1) { + avpriv_request_sample(s->avctx, "Unknown profile %d", s->profile); + return AVERROR_INVALIDDATA; + } + + s->keyframe = !(buf[0] & 1); + s->invisible = 0; + part1_size = AV_RL24(buf) >> 4; + + if (buf_size < 4 - s->profile + part1_size) { + av_log(s->avctx, AV_LOG_ERROR, "Buffer size %d is too small, needed : %d\n", buf_size, 4 - s->profile + part1_size); + return AVERROR_INVALIDDATA; + } + + buf += 4 - s->profile; + buf_size -= 4 - s->profile; + + memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_epel_pixels_tab, sizeof(s->put_pixels_tab)); + + ret = ff_vp56_init_range_decoder(c, buf, part1_size); + if (ret < 0) + return ret; + buf += part1_size; + buf_size -= part1_size; + + /* A. Dimension information (keyframes only) */ + if (s->keyframe) { + width = vp8_rac_get_uint(c, 12); + height = vp8_rac_get_uint(c, 12); + hscale = vp8_rac_get_uint(c, 2); + vscale = vp8_rac_get_uint(c, 2); + if (hscale || vscale) + avpriv_request_sample(s->avctx, "Upscaling"); + + s->update_golden = s->update_altref = VP56_FRAME_CURRENT; + vp78_reset_probability_tables(s); + memcpy(s->prob->pred16x16, vp8_pred16x16_prob_inter, + sizeof(s->prob->pred16x16)); + memcpy(s->prob->pred8x8c, vp8_pred8x8c_prob_inter, + sizeof(s->prob->pred8x8c)); + for (i = 0; i < 2; i++) + memcpy(s->prob->mvc[i], vp7_mv_default_prob[i], + sizeof(vp7_mv_default_prob[i])); + memset(&s->segmentation, 0, sizeof(s->segmentation)); + memset(&s->lf_delta, 0, sizeof(s->lf_delta)); + memcpy(s->prob[0].scan, ff_zigzag_scan, sizeof(s->prob[0].scan)); + } + + if (s->keyframe || s->profile > 0) + memset(s->inter_dc_pred, 0 , sizeof(s->inter_dc_pred)); + + /* B. Decoding information for all four macroblock-level features */ + for (i = 0; i < 4; i++) { + s->feature_enabled[i] = vp8_rac_get(c); + if (s->feature_enabled[i]) { + s->feature_present_prob[i] = vp8_rac_get_uint(c, 8); + + for (j = 0; j < 3; j++) + s->feature_index_prob[i][j] = + vp8_rac_get(c) ? vp8_rac_get_uint(c, 8) : 255; + + if (vp7_feature_value_size[s->profile][i]) + for (j = 0; j < 4; j++) + s->feature_value[i][j] = + vp8_rac_get(c) ? vp8_rac_get_uint(c, vp7_feature_value_size[s->profile][i]) : 0; + } + } + + s->segmentation.enabled = 0; + s->segmentation.update_map = 0; + s->lf_delta.enabled = 0; + + s->num_coeff_partitions = 1; + ret = ff_vp56_init_range_decoder(&s->coeff_partition[0], buf, buf_size); + if (ret < 0) + return ret; + + if (!s->macroblocks_base || /* first frame */ + width != s->avctx->width || height != s->avctx->height || + (width + 15) / 16 != s->mb_width || (height + 15) / 16 != s->mb_height) { + if ((ret = vp7_update_dimensions(s, width, height)) < 0) + return ret; + } + + /* C. Dequantization indices */ + vp7_get_quants(s); + + /* D. Golden frame update flag (a Flag) for interframes only */ + if (!s->keyframe) { + s->update_golden = vp8_rac_get(c) ? VP56_FRAME_CURRENT : VP56_FRAME_NONE; + s->sign_bias[VP56_FRAME_GOLDEN] = 0; + } + + s->update_last = 1; + s->update_probabilities = 1; + s->fade_present = 1; + + if (s->profile > 0) { + s->update_probabilities = vp8_rac_get(c); + if (!s->update_probabilities) + s->prob[1] = s->prob[0]; + + if (!s->keyframe) + s->fade_present = vp8_rac_get(c); + } + + if (vpX_rac_is_end(c)) + return AVERROR_INVALIDDATA; + /* E. Fading information for previous frame */ + if (s->fade_present && vp8_rac_get(c)) { + if ((ret = vp7_fade_frame(s ,c)) < 0) + return ret; + } + + /* F. Loop filter type */ + if (!s->profile) + s->filter.simple = vp8_rac_get(c); + + /* G. DCT coefficient ordering specification */ + if (vp8_rac_get(c)) + for (i = 1; i < 16; i++) + s->prob[0].scan[i] = ff_zigzag_scan[vp8_rac_get_uint(c, 4)]; + + /* H. Loop filter levels */ + if (s->profile > 0) + s->filter.simple = vp8_rac_get(c); + s->filter.level = vp8_rac_get_uint(c, 6); + s->filter.sharpness = vp8_rac_get_uint(c, 3); + + /* I. DCT coefficient probability update; 13.3 Token Probability Updates */ + vp78_update_probability_tables(s); + + s->mbskip_enabled = 0; + + /* J. The remaining frame header data occurs ONLY FOR INTERFRAMES */ + if (!s->keyframe) { + s->prob->intra = vp8_rac_get_uint(c, 8); + s->prob->last = vp8_rac_get_uint(c, 8); + vp78_update_pred16x16_pred8x8_mvc_probabilities(s, VP7_MVC_SIZE); + } + + return 0; +} + +static int vp8_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_size) +{ + VP56RangeCoder *c = &s->c; + int header_size, hscale, vscale, ret; + int width = s->avctx->width; + int height = s->avctx->height; + + if (buf_size < 3) { + av_log(s->avctx, AV_LOG_ERROR, "Insufficent data (%d) for header\n", buf_size); + return AVERROR_INVALIDDATA; + } + + s->keyframe = !(buf[0] & 1); + s->profile = (buf[0]>>1) & 7; + s->invisible = !(buf[0] & 0x10); + header_size = AV_RL24(buf) >> 5; + buf += 3; + buf_size -= 3; + + s->header_partition_size = header_size; + + if (s->profile > 3) + av_log(s->avctx, AV_LOG_WARNING, "Unknown profile %d\n", s->profile); + + if (!s->profile) + memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_epel_pixels_tab, + sizeof(s->put_pixels_tab)); + else // profile 1-3 use bilinear, 4+ aren't defined so whatever + memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_bilinear_pixels_tab, + sizeof(s->put_pixels_tab)); + + if (header_size > buf_size - 7 * s->keyframe) { + av_log(s->avctx, AV_LOG_ERROR, "Header size larger than data provided\n"); + return AVERROR_INVALIDDATA; + } + + if (s->keyframe) { + if (AV_RL24(buf) != 0x2a019d) { + av_log(s->avctx, AV_LOG_ERROR, + "Invalid start code 0x%x\n", AV_RL24(buf)); + return AVERROR_INVALIDDATA; + } + width = AV_RL16(buf + 3) & 0x3fff; + height = AV_RL16(buf + 5) & 0x3fff; + hscale = buf[4] >> 6; + vscale = buf[6] >> 6; + buf += 7; + buf_size -= 7; + + if (hscale || vscale) + avpriv_request_sample(s->avctx, "Upscaling"); + + s->update_golden = s->update_altref = VP56_FRAME_CURRENT; + vp78_reset_probability_tables(s); + memcpy(s->prob->pred16x16, vp8_pred16x16_prob_inter, + sizeof(s->prob->pred16x16)); + memcpy(s->prob->pred8x8c, vp8_pred8x8c_prob_inter, + sizeof(s->prob->pred8x8c)); + memcpy(s->prob->mvc, vp8_mv_default_prob, + sizeof(s->prob->mvc)); + memset(&s->segmentation, 0, sizeof(s->segmentation)); + memset(&s->lf_delta, 0, sizeof(s->lf_delta)); + } + + ret = ff_vp56_init_range_decoder(c, buf, header_size); + if (ret < 0) + return ret; + buf += header_size; + buf_size -= header_size; + + if (s->keyframe) { + s->colorspace = vp8_rac_get(c); + if (s->colorspace) + av_log(s->avctx, AV_LOG_WARNING, "Unspecified colorspace\n"); + s->fullrange = vp8_rac_get(c); + } + + if ((s->segmentation.enabled = vp8_rac_get(c))) + parse_segment_info(s); + else + s->segmentation.update_map = 0; // FIXME: move this to some init function? + + s->filter.simple = vp8_rac_get(c); + s->filter.level = vp8_rac_get_uint(c, 6); + s->filter.sharpness = vp8_rac_get_uint(c, 3); + + if ((s->lf_delta.enabled = vp8_rac_get(c))) { + s->lf_delta.update = vp8_rac_get(c); + if (s->lf_delta.update) + update_lf_deltas(s); + } + + if (setup_partitions(s, buf, buf_size)) { + av_log(s->avctx, AV_LOG_ERROR, "Invalid partitions\n"); + return AVERROR_INVALIDDATA; + } + + if (!s->macroblocks_base || /* first frame */ + width != s->avctx->width || height != s->avctx->height || + (width+15)/16 != s->mb_width || (height+15)/16 != s->mb_height) + if ((ret = vp8_update_dimensions(s, width, height)) < 0) + return ret; + + vp8_get_quants(s); + + if (!s->keyframe) { + update_refs(s); + s->sign_bias[VP56_FRAME_GOLDEN] = vp8_rac_get(c); + s->sign_bias[VP56_FRAME_GOLDEN2 /* altref */] = vp8_rac_get(c); + } + + // if we aren't saving this frame's probabilities for future frames, + // make a copy of the current probabilities + if (!(s->update_probabilities = vp8_rac_get(c))) + s->prob[1] = s->prob[0]; + + s->update_last = s->keyframe || vp8_rac_get(c); + + vp78_update_probability_tables(s); + + if ((s->mbskip_enabled = vp8_rac_get(c))) + s->prob->mbskip = vp8_rac_get_uint(c, 8); + + if (!s->keyframe) { + s->prob->intra = vp8_rac_get_uint(c, 8); + s->prob->last = vp8_rac_get_uint(c, 8); + s->prob->golden = vp8_rac_get_uint(c, 8); + vp78_update_pred16x16_pred8x8_mvc_probabilities(s, VP8_MVC_SIZE); + } + + // Record the entropy coder state here so that hwaccels can use it. + s->c.code_word = vp56_rac_renorm(&s->c); + s->coder_state_at_header_end.input = s->c.buffer - (-s->c.bits / 8); + s->coder_state_at_header_end.range = s->c.high; + s->coder_state_at_header_end.value = s->c.code_word >> 16; + s->coder_state_at_header_end.bit_count = -s->c.bits % 8; + + return 0; +} + +static av_always_inline +void clamp_mv(VP8mvbounds *s, VP56mv *dst, const VP56mv *src) +{ + dst->x = av_clip(src->x, av_clip(s->mv_min.x, INT16_MIN, INT16_MAX), + av_clip(s->mv_max.x, INT16_MIN, INT16_MAX)); + dst->y = av_clip(src->y, av_clip(s->mv_min.y, INT16_MIN, INT16_MAX), + av_clip(s->mv_max.y, INT16_MIN, INT16_MAX)); +} + +/** + * Motion vector coding, 17.1. + */ +static av_always_inline int read_mv_component(VP56RangeCoder *c, const uint8_t *p, int vp7) +{ + int bit, x = 0; + + if (vp56_rac_get_prob_branchy(c, p[0])) { + int i; + + for (i = 0; i < 3; i++) + x += vp56_rac_get_prob(c, p[9 + i]) << i; + for (i = (vp7 ? 7 : 9); i > 3; i--) + x += vp56_rac_get_prob(c, p[9 + i]) << i; + if (!(x & (vp7 ? 0xF0 : 0xFFF0)) || vp56_rac_get_prob(c, p[12])) + x += 8; + } else { + // small_mvtree + const uint8_t *ps = p + 2; + bit = vp56_rac_get_prob(c, *ps); + ps += 1 + 3 * bit; + x += 4 * bit; + bit = vp56_rac_get_prob(c, *ps); + ps += 1 + bit; + x += 2 * bit; + x += vp56_rac_get_prob(c, *ps); + } + + return (x && vp56_rac_get_prob(c, p[1])) ? -x : x; +} + +static int vp7_read_mv_component(VP56RangeCoder *c, const uint8_t *p) +{ + return read_mv_component(c, p, 1); +} + +static int vp8_read_mv_component(VP56RangeCoder *c, const uint8_t *p) +{ + return read_mv_component(c, p, 0); +} + +static av_always_inline +const uint8_t *get_submv_prob(uint32_t left, uint32_t top, int is_vp7) +{ + if (is_vp7) + return vp7_submv_prob; + + if (left == top) + return vp8_submv_prob[4 - !!left]; + if (!top) + return vp8_submv_prob[2]; + return vp8_submv_prob[1 - !!left]; +} + +/** + * Split motion vector prediction, 16.4. + * @returns the number of motion vectors parsed (2, 4 or 16) + */ +static av_always_inline +int decode_splitmvs(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb, + int layout, int is_vp7) +{ + int part_idx; + int n, num; + VP8Macroblock *top_mb; + VP8Macroblock *left_mb = &mb[-1]; + const uint8_t *mbsplits_left = vp8_mbsplits[left_mb->partitioning]; + const uint8_t *mbsplits_top, *mbsplits_cur, *firstidx; + VP56mv *top_mv; + VP56mv *left_mv = left_mb->bmv; + VP56mv *cur_mv = mb->bmv; + + if (!layout) // layout is inlined, s->mb_layout is not + top_mb = &mb[2]; + else + top_mb = &mb[-s->mb_width - 1]; + mbsplits_top = vp8_mbsplits[top_mb->partitioning]; + top_mv = top_mb->bmv; + + if (vp56_rac_get_prob_branchy(c, vp8_mbsplit_prob[0])) { + if (vp56_rac_get_prob_branchy(c, vp8_mbsplit_prob[1])) + part_idx = VP8_SPLITMVMODE_16x8 + vp56_rac_get_prob(c, vp8_mbsplit_prob[2]); + else + part_idx = VP8_SPLITMVMODE_8x8; + } else { + part_idx = VP8_SPLITMVMODE_4x4; + } + + num = vp8_mbsplit_count[part_idx]; + mbsplits_cur = vp8_mbsplits[part_idx], + firstidx = vp8_mbfirstidx[part_idx]; + mb->partitioning = part_idx; + + for (n = 0; n < num; n++) { + int k = firstidx[n]; + uint32_t left, above; + const uint8_t *submv_prob; + + if (!(k & 3)) + left = AV_RN32A(&left_mv[mbsplits_left[k + 3]]); + else + left = AV_RN32A(&cur_mv[mbsplits_cur[k - 1]]); + if (k <= 3) + above = AV_RN32A(&top_mv[mbsplits_top[k + 12]]); + else + above = AV_RN32A(&cur_mv[mbsplits_cur[k - 4]]); + + submv_prob = get_submv_prob(left, above, is_vp7); + + if (vp56_rac_get_prob_branchy(c, submv_prob[0])) { + if (vp56_rac_get_prob_branchy(c, submv_prob[1])) { + if (vp56_rac_get_prob_branchy(c, submv_prob[2])) { + mb->bmv[n].y = mb->mv.y + + read_mv_component(c, s->prob->mvc[0], is_vp7); + mb->bmv[n].x = mb->mv.x + + read_mv_component(c, s->prob->mvc[1], is_vp7); + } else { + AV_ZERO32(&mb->bmv[n]); + } + } else { + AV_WN32A(&mb->bmv[n], above); + } + } else { + AV_WN32A(&mb->bmv[n], left); + } + } + + return num; +} + +/** + * The vp7 reference decoder uses a padding macroblock column (added to right + * edge of the frame) to guard against illegal macroblock offsets. The + * algorithm has bugs that permit offsets to straddle the padding column. + * This function replicates those bugs. + * + * @param[out] edge_x macroblock x address + * @param[out] edge_y macroblock y address + * + * @return macroblock offset legal (boolean) + */ +static int vp7_calculate_mb_offset(int mb_x, int mb_y, int mb_width, + int xoffset, int yoffset, int boundary, + int *edge_x, int *edge_y) +{ + int vwidth = mb_width + 1; + int new = (mb_y + yoffset) * vwidth + mb_x + xoffset; + if (new < boundary || new % vwidth == vwidth - 1) + return 0; + *edge_y = new / vwidth; + *edge_x = new % vwidth; + return 1; +} + +static const VP56mv *get_bmv_ptr(const VP8Macroblock *mb, int subblock) +{ + return &mb->bmv[mb->mode == VP8_MVMODE_SPLIT ? vp8_mbsplits[mb->partitioning][subblock] : 0]; +} + +static av_always_inline +void vp7_decode_mvs(VP8Context *s, VP8Macroblock *mb, + int mb_x, int mb_y, int layout) +{ + VP8Macroblock *mb_edge[12]; + enum { CNT_ZERO, CNT_NEAREST, CNT_NEAR }; + enum { VP8_EDGE_TOP, VP8_EDGE_LEFT, VP8_EDGE_TOPLEFT }; + int idx = CNT_ZERO; + VP56mv near_mv[3]; + uint8_t cnt[3] = { 0 }; + VP56RangeCoder *c = &s->c; + int i; + + AV_ZERO32(&near_mv[0]); + AV_ZERO32(&near_mv[1]); + AV_ZERO32(&near_mv[2]); + + for (i = 0; i < VP7_MV_PRED_COUNT; i++) { + const VP7MVPred * pred = &vp7_mv_pred[i]; + int edge_x, edge_y; + + if (vp7_calculate_mb_offset(mb_x, mb_y, s->mb_width, pred->xoffset, + pred->yoffset, !s->profile, &edge_x, &edge_y)) { + VP8Macroblock *edge = mb_edge[i] = (s->mb_layout == 1) + ? s->macroblocks_base + 1 + edge_x + + (s->mb_width + 1) * (edge_y + 1) + : s->macroblocks + edge_x + + (s->mb_height - edge_y - 1) * 2; + uint32_t mv = AV_RN32A(get_bmv_ptr(edge, vp7_mv_pred[i].subblock)); + if (mv) { + if (AV_RN32A(&near_mv[CNT_NEAREST])) { + if (mv == AV_RN32A(&near_mv[CNT_NEAREST])) { + idx = CNT_NEAREST; + } else if (AV_RN32A(&near_mv[CNT_NEAR])) { + if (mv != AV_RN32A(&near_mv[CNT_NEAR])) + continue; + idx = CNT_NEAR; + } else { + AV_WN32A(&near_mv[CNT_NEAR], mv); + idx = CNT_NEAR; + } + } else { + AV_WN32A(&near_mv[CNT_NEAREST], mv); + idx = CNT_NEAREST; + } + } else { + idx = CNT_ZERO; + } + } else { + idx = CNT_ZERO; + } + cnt[idx] += vp7_mv_pred[i].score; + } + + mb->partitioning = VP8_SPLITMVMODE_NONE; + + if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_ZERO]][0])) { + mb->mode = VP8_MVMODE_MV; + + if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_NEAREST]][1])) { + + if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_NEAR]][2])) { + + if (cnt[CNT_NEAREST] > cnt[CNT_NEAR]) + AV_WN32A(&mb->mv, cnt[CNT_ZERO] > cnt[CNT_NEAREST] ? 0 : AV_RN32A(&near_mv[CNT_NEAREST])); + else + AV_WN32A(&mb->mv, cnt[CNT_ZERO] > cnt[CNT_NEAR] ? 0 : AV_RN32A(&near_mv[CNT_NEAR])); + + if (vp56_rac_get_prob_branchy(c, vp7_mode_contexts[cnt[CNT_NEAR]][3])) { + mb->mode = VP8_MVMODE_SPLIT; + mb->mv = mb->bmv[decode_splitmvs(s, c, mb, layout, IS_VP7) - 1]; + } else { + mb->mv.y += vp7_read_mv_component(c, s->prob->mvc[0]); + mb->mv.x += vp7_read_mv_component(c, s->prob->mvc[1]); + mb->bmv[0] = mb->mv; + } + } else { + mb->mv = near_mv[CNT_NEAR]; + mb->bmv[0] = mb->mv; + } + } else { + mb->mv = near_mv[CNT_NEAREST]; + mb->bmv[0] = mb->mv; + } + } else { + mb->mode = VP8_MVMODE_ZERO; + AV_ZERO32(&mb->mv); + mb->bmv[0] = mb->mv; + } +} + +static av_always_inline +void vp8_decode_mvs(VP8Context *s, VP8mvbounds *mv_bounds, VP8Macroblock *mb, + int mb_x, int mb_y, int layout) +{ + VP8Macroblock *mb_edge[3] = { 0 /* top */, + mb - 1 /* left */, + 0 /* top-left */ }; + enum { CNT_ZERO, CNT_NEAREST, CNT_NEAR, CNT_SPLITMV }; + enum { VP8_EDGE_TOP, VP8_EDGE_LEFT, VP8_EDGE_TOPLEFT }; + int idx = CNT_ZERO; + int cur_sign_bias = s->sign_bias[mb->ref_frame]; + int8_t *sign_bias = s->sign_bias; + VP56mv near_mv[4]; + uint8_t cnt[4] = { 0 }; + VP56RangeCoder *c = &s->c; + + if (!layout) { // layout is inlined (s->mb_layout is not) + mb_edge[0] = mb + 2; + mb_edge[2] = mb + 1; + } else { + mb_edge[0] = mb - s->mb_width - 1; + mb_edge[2] = mb - s->mb_width - 2; + } + + AV_ZERO32(&near_mv[0]); + AV_ZERO32(&near_mv[1]); + AV_ZERO32(&near_mv[2]); + + /* Process MB on top, left and top-left */ +#define MV_EDGE_CHECK(n) \ + { \ + VP8Macroblock *edge = mb_edge[n]; \ + int edge_ref = edge->ref_frame; \ + if (edge_ref != VP56_FRAME_CURRENT) { \ + uint32_t mv = AV_RN32A(&edge->mv); \ + if (mv) { \ + if (cur_sign_bias != sign_bias[edge_ref]) { \ + /* SWAR negate of the values in mv. */ \ + mv = ~mv; \ + mv = ((mv & 0x7fff7fff) + \ + 0x00010001) ^ (mv & 0x80008000); \ + } \ + if (!n || mv != AV_RN32A(&near_mv[idx])) \ + AV_WN32A(&near_mv[++idx], mv); \ + cnt[idx] += 1 + (n != 2); \ + } else \ + cnt[CNT_ZERO] += 1 + (n != 2); \ + } \ + } + + MV_EDGE_CHECK(0) + MV_EDGE_CHECK(1) + MV_EDGE_CHECK(2) + + mb->partitioning = VP8_SPLITMVMODE_NONE; + if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_ZERO]][0])) { + mb->mode = VP8_MVMODE_MV; + + /* If we have three distinct MVs, merge first and last if they're the same */ + if (cnt[CNT_SPLITMV] && + AV_RN32A(&near_mv[1 + VP8_EDGE_TOP]) == AV_RN32A(&near_mv[1 + VP8_EDGE_TOPLEFT])) + cnt[CNT_NEAREST] += 1; + + /* Swap near and nearest if necessary */ + if (cnt[CNT_NEAR] > cnt[CNT_NEAREST]) { + FFSWAP(uint8_t, cnt[CNT_NEAREST], cnt[CNT_NEAR]); + FFSWAP( VP56mv, near_mv[CNT_NEAREST], near_mv[CNT_NEAR]); + } + + if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_NEAREST]][1])) { + if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_NEAR]][2])) { + /* Choose the best mv out of 0,0 and the nearest mv */ + clamp_mv(mv_bounds, &mb->mv, &near_mv[CNT_ZERO + (cnt[CNT_NEAREST] >= cnt[CNT_ZERO])]); + cnt[CNT_SPLITMV] = ((mb_edge[VP8_EDGE_LEFT]->mode == VP8_MVMODE_SPLIT) + + (mb_edge[VP8_EDGE_TOP]->mode == VP8_MVMODE_SPLIT)) * 2 + + (mb_edge[VP8_EDGE_TOPLEFT]->mode == VP8_MVMODE_SPLIT); + + if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[CNT_SPLITMV]][3])) { + mb->mode = VP8_MVMODE_SPLIT; + mb->mv = mb->bmv[decode_splitmvs(s, c, mb, layout, IS_VP8) - 1]; + } else { + mb->mv.y += vp8_read_mv_component(c, s->prob->mvc[0]); + mb->mv.x += vp8_read_mv_component(c, s->prob->mvc[1]); + mb->bmv[0] = mb->mv; + } + } else { + clamp_mv(mv_bounds, &mb->mv, &near_mv[CNT_NEAR]); + mb->bmv[0] = mb->mv; + } + } else { + clamp_mv(mv_bounds, &mb->mv, &near_mv[CNT_NEAREST]); + mb->bmv[0] = mb->mv; + } + } else { + mb->mode = VP8_MVMODE_ZERO; + AV_ZERO32(&mb->mv); + mb->bmv[0] = mb->mv; + } +} + +static av_always_inline +void decode_intra4x4_modes(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb, + int mb_x, int keyframe, int layout) +{ + uint8_t *intra4x4 = mb->intra4x4_pred_mode_mb; + + if (layout) { + VP8Macroblock *mb_top = mb - s->mb_width - 1; + memcpy(mb->intra4x4_pred_mode_top, mb_top->intra4x4_pred_mode_top, 4); + } + if (keyframe) { + int x, y; + uint8_t *top; + uint8_t *const left = s->intra4x4_pred_mode_left; + if (layout) + top = mb->intra4x4_pred_mode_top; + else + top = s->intra4x4_pred_mode_top + 4 * mb_x; + for (y = 0; y < 4; y++) { + for (x = 0; x < 4; x++) { + const uint8_t *ctx; + ctx = vp8_pred4x4_prob_intra[top[x]][left[y]]; + *intra4x4 = vp8_rac_get_tree(c, vp8_pred4x4_tree, ctx); + left[y] = top[x] = *intra4x4; + intra4x4++; + } + } + } else { + int i; + for (i = 0; i < 16; i++) + intra4x4[i] = vp8_rac_get_tree(c, vp8_pred4x4_tree, + vp8_pred4x4_prob_inter); + } +} + +static av_always_inline +void decode_mb_mode(VP8Context *s, VP8mvbounds *mv_bounds, + VP8Macroblock *mb, int mb_x, int mb_y, + uint8_t *segment, uint8_t *ref, int layout, int is_vp7) +{ + VP56RangeCoder *c = &s->c; + static const char * const vp7_feature_name[] = { "q-index", + "lf-delta", + "partial-golden-update", + "blit-pitch" }; + if (is_vp7) { + int i; + *segment = 0; + for (i = 0; i < 4; i++) { + if (s->feature_enabled[i]) { + if (vp56_rac_get_prob_branchy(c, s->feature_present_prob[i])) { + int index = vp8_rac_get_tree(c, vp7_feature_index_tree, + s->feature_index_prob[i]); + av_log(s->avctx, AV_LOG_WARNING, + "Feature %s present in macroblock (value 0x%x)\n", + vp7_feature_name[i], s->feature_value[i][index]); + } + } + } + } else if (s->segmentation.update_map) { + int bit = vp56_rac_get_prob(c, s->prob->segmentid[0]); + *segment = vp56_rac_get_prob(c, s->prob->segmentid[1+bit]) + 2*bit; + } else if (s->segmentation.enabled) + *segment = ref ? *ref : *segment; + mb->segment = *segment; + + mb->skip = s->mbskip_enabled ? vp56_rac_get_prob(c, s->prob->mbskip) : 0; + + if (s->keyframe) { + mb->mode = vp8_rac_get_tree(c, vp8_pred16x16_tree_intra, + vp8_pred16x16_prob_intra); + + if (mb->mode == MODE_I4x4) { + decode_intra4x4_modes(s, c, mb, mb_x, 1, layout); + } else { + const uint32_t modes = (is_vp7 ? vp7_pred4x4_mode + : vp8_pred4x4_mode)[mb->mode] * 0x01010101u; + if (s->mb_layout) + AV_WN32A(mb->intra4x4_pred_mode_top, modes); + else + AV_WN32A(s->intra4x4_pred_mode_top + 4 * mb_x, modes); + AV_WN32A(s->intra4x4_pred_mode_left, modes); + } + + mb->chroma_pred_mode = vp8_rac_get_tree(c, vp8_pred8x8c_tree, + vp8_pred8x8c_prob_intra); + mb->ref_frame = VP56_FRAME_CURRENT; + } else if (vp56_rac_get_prob_branchy(c, s->prob->intra)) { + // inter MB, 16.2 + if (vp56_rac_get_prob_branchy(c, s->prob->last)) + mb->ref_frame = + (!is_vp7 && vp56_rac_get_prob(c, s->prob->golden)) ? VP56_FRAME_GOLDEN2 /* altref */ + : VP56_FRAME_GOLDEN; + else + mb->ref_frame = VP56_FRAME_PREVIOUS; + s->ref_count[mb->ref_frame - 1]++; + + // motion vectors, 16.3 + if (is_vp7) + vp7_decode_mvs(s, mb, mb_x, mb_y, layout); + else + vp8_decode_mvs(s, mv_bounds, mb, mb_x, mb_y, layout); + } else { + // intra MB, 16.1 + mb->mode = vp8_rac_get_tree(c, vp8_pred16x16_tree_inter, s->prob->pred16x16); + + if (mb->mode == MODE_I4x4) + decode_intra4x4_modes(s, c, mb, mb_x, 0, layout); + + mb->chroma_pred_mode = vp8_rac_get_tree(c, vp8_pred8x8c_tree, + s->prob->pred8x8c); + mb->ref_frame = VP56_FRAME_CURRENT; + mb->partitioning = VP8_SPLITMVMODE_NONE; + AV_ZERO32(&mb->bmv[0]); + } +} + +/** + * @param r arithmetic bitstream reader context + * @param block destination for block coefficients + * @param probs probabilities to use when reading trees from the bitstream + * @param i initial coeff index, 0 unless a separate DC block is coded + * @param qmul array holding the dc/ac dequant factor at position 0/1 + * + * @return 0 if no coeffs were decoded + * otherwise, the index of the last coeff decoded plus one + */ +static av_always_inline +int decode_block_coeffs_internal(VP56RangeCoder *r, int16_t block[16], + uint8_t probs[16][3][NUM_DCT_TOKENS - 1], + int i, uint8_t *token_prob, int16_t qmul[2], + const uint8_t scan[16], int vp7) +{ + VP56RangeCoder c = *r; + goto skip_eob; + do { + int coeff; +restart: + if (!vp56_rac_get_prob_branchy(&c, token_prob[0])) // DCT_EOB + break; + +skip_eob: + if (!vp56_rac_get_prob_branchy(&c, token_prob[1])) { // DCT_0 + if (++i == 16) + break; // invalid input; blocks should end with EOB + token_prob = probs[i][0]; + if (vp7) + goto restart; + goto skip_eob; + } + + if (!vp56_rac_get_prob_branchy(&c, token_prob[2])) { // DCT_1 + coeff = 1; + token_prob = probs[i + 1][1]; + } else { + if (!vp56_rac_get_prob_branchy(&c, token_prob[3])) { // DCT 2,3,4 + coeff = vp56_rac_get_prob_branchy(&c, token_prob[4]); + if (coeff) + coeff += vp56_rac_get_prob(&c, token_prob[5]); + coeff += 2; + } else { + // DCT_CAT* + if (!vp56_rac_get_prob_branchy(&c, token_prob[6])) { + if (!vp56_rac_get_prob_branchy(&c, token_prob[7])) { // DCT_CAT1 + coeff = 5 + vp56_rac_get_prob(&c, vp8_dct_cat1_prob[0]); + } else { // DCT_CAT2 + coeff = 7; + coeff += vp56_rac_get_prob(&c, vp8_dct_cat2_prob[0]) << 1; + coeff += vp56_rac_get_prob(&c, vp8_dct_cat2_prob[1]); + } + } else { // DCT_CAT3 and up + int a = vp56_rac_get_prob(&c, token_prob[8]); + int b = vp56_rac_get_prob(&c, token_prob[9 + a]); + int cat = (a << 1) + b; + coeff = 3 + (8 << cat); + coeff += vp8_rac_get_coeff(&c, ff_vp8_dct_cat_prob[cat]); + } + } + token_prob = probs[i + 1][2]; + } + block[scan[i]] = (vp8_rac_get(&c) ? -coeff : coeff) * qmul[!!i]; + } while (++i < 16); + + *r = c; + return i; +} + +static av_always_inline +int inter_predict_dc(int16_t block[16], int16_t pred[2]) +{ + int16_t dc = block[0]; + int ret = 0; + + if (pred[1] > 3) { + dc += pred[0]; + ret = 1; + } + + if (!pred[0] | !dc | ((int32_t)pred[0] ^ (int32_t)dc) >> 31) { + block[0] = pred[0] = dc; + pred[1] = 0; + } else { + if (pred[0] == dc) + pred[1]++; + block[0] = pred[0] = dc; + } + + return ret; +} + +static int vp7_decode_block_coeffs_internal(VP56RangeCoder *r, + int16_t block[16], + uint8_t probs[16][3][NUM_DCT_TOKENS - 1], + int i, uint8_t *token_prob, + int16_t qmul[2], + const uint8_t scan[16]) +{ + return decode_block_coeffs_internal(r, block, probs, i, + token_prob, qmul, scan, IS_VP7); +} + +#ifndef vp8_decode_block_coeffs_internal +static int vp8_decode_block_coeffs_internal(VP56RangeCoder *r, + int16_t block[16], + uint8_t probs[16][3][NUM_DCT_TOKENS - 1], + int i, uint8_t *token_prob, + int16_t qmul[2]) +{ + return decode_block_coeffs_internal(r, block, probs, i, + token_prob, qmul, ff_zigzag_scan, IS_VP8); +} +#endif + +/** + * @param c arithmetic bitstream reader context + * @param block destination for block coefficients + * @param probs probabilities to use when reading trees from the bitstream + * @param i initial coeff index, 0 unless a separate DC block is coded + * @param zero_nhood the initial prediction context for number of surrounding + * all-zero blocks (only left/top, so 0-2) + * @param qmul array holding the dc/ac dequant factor at position 0/1 + * @param scan scan pattern (VP7 only) + * + * @return 0 if no coeffs were decoded + * otherwise, the index of the last coeff decoded plus one + */ +static av_always_inline +int decode_block_coeffs(VP56RangeCoder *c, int16_t block[16], + uint8_t probs[16][3][NUM_DCT_TOKENS - 1], + int i, int zero_nhood, int16_t qmul[2], + const uint8_t scan[16], int vp7) +{ + uint8_t *token_prob = probs[i][zero_nhood]; + if (!vp56_rac_get_prob_branchy(c, token_prob[0])) // DCT_EOB + return 0; + return vp7 ? vp7_decode_block_coeffs_internal(c, block, probs, i, + token_prob, qmul, scan) + : vp8_decode_block_coeffs_internal(c, block, probs, i, + token_prob, qmul); +} + +static av_always_inline +void decode_mb_coeffs(VP8Context *s, VP8ThreadData *td, VP56RangeCoder *c, + VP8Macroblock *mb, uint8_t t_nnz[9], uint8_t l_nnz[9], + int is_vp7) +{ + int i, x, y, luma_start = 0, luma_ctx = 3; + int nnz_pred, nnz, nnz_total = 0; + int segment = mb->segment; + int block_dc = 0; + + if (mb->mode != MODE_I4x4 && (is_vp7 || mb->mode != VP8_MVMODE_SPLIT)) { + nnz_pred = t_nnz[8] + l_nnz[8]; + + // decode DC values and do hadamard + nnz = decode_block_coeffs(c, td->block_dc, s->prob->token[1], 0, + nnz_pred, s->qmat[segment].luma_dc_qmul, + ff_zigzag_scan, is_vp7); + l_nnz[8] = t_nnz[8] = !!nnz; + + if (is_vp7 && mb->mode > MODE_I4x4) { + nnz |= inter_predict_dc(td->block_dc, + s->inter_dc_pred[mb->ref_frame - 1]); + } + + if (nnz) { + nnz_total += nnz; + block_dc = 1; + if (nnz == 1) + s->vp8dsp.vp8_luma_dc_wht_dc(td->block, td->block_dc); + else + s->vp8dsp.vp8_luma_dc_wht(td->block, td->block_dc); + } + luma_start = 1; + luma_ctx = 0; + } + + // luma blocks + for (y = 0; y < 4; y++) + for (x = 0; x < 4; x++) { + nnz_pred = l_nnz[y] + t_nnz[x]; + nnz = decode_block_coeffs(c, td->block[y][x], + s->prob->token[luma_ctx], + luma_start, nnz_pred, + s->qmat[segment].luma_qmul, + s->prob[0].scan, is_vp7); + /* nnz+block_dc may be one more than the actual last index, + * but we don't care */ + td->non_zero_count_cache[y][x] = nnz + block_dc; + t_nnz[x] = l_nnz[y] = !!nnz; + nnz_total += nnz; + } + + // chroma blocks + // TODO: what to do about dimensions? 2nd dim for luma is x, + // but for chroma it's (y<<1)|x + for (i = 4; i < 6; i++) + for (y = 0; y < 2; y++) + for (x = 0; x < 2; x++) { + nnz_pred = l_nnz[i + 2 * y] + t_nnz[i + 2 * x]; + nnz = decode_block_coeffs(c, td->block[i][(y << 1) + x], + s->prob->token[2], 0, nnz_pred, + s->qmat[segment].chroma_qmul, + s->prob[0].scan, is_vp7); + td->non_zero_count_cache[i][(y << 1) + x] = nnz; + t_nnz[i + 2 * x] = l_nnz[i + 2 * y] = !!nnz; + nnz_total += nnz; + } + + // if there were no coded coeffs despite the macroblock not being marked skip, + // we MUST not do the inner loop filter and should not do IDCT + // Since skip isn't used for bitstream prediction, just manually set it. + if (!nnz_total) + mb->skip = 1; +} + +static av_always_inline +void backup_mb_border(uint8_t *top_border, uint8_t *src_y, + uint8_t *src_cb, uint8_t *src_cr, + ptrdiff_t linesize, ptrdiff_t uvlinesize, int simple) +{ + AV_COPY128(top_border, src_y + 15 * linesize); + if (!simple) { + AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize); + AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize); + } +} + +static av_always_inline +void xchg_mb_border(uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, + uint8_t *src_cr, ptrdiff_t linesize, ptrdiff_t uvlinesize, int mb_x, + int mb_y, int mb_width, int simple, int xchg) +{ + uint8_t *top_border_m1 = top_border - 32; // for TL prediction + src_y -= linesize; + src_cb -= uvlinesize; + src_cr -= uvlinesize; + +#define XCHG(a, b, xchg) \ + do { \ + if (xchg) \ + AV_SWAP64(b, a); \ + else \ + AV_COPY64(b, a); \ + } while (0) + + XCHG(top_border_m1 + 8, src_y - 8, xchg); + XCHG(top_border, src_y, xchg); + XCHG(top_border + 8, src_y + 8, 1); + if (mb_x < mb_width - 1) + XCHG(top_border + 32, src_y + 16, 1); + + // only copy chroma for normal loop filter + // or to initialize the top row to 127 + if (!simple || !mb_y) { + XCHG(top_border_m1 + 16, src_cb - 8, xchg); + XCHG(top_border_m1 + 24, src_cr - 8, xchg); + XCHG(top_border + 16, src_cb, 1); + XCHG(top_border + 24, src_cr, 1); + } +} + +static av_always_inline +int check_dc_pred8x8_mode(int mode, int mb_x, int mb_y) +{ + if (!mb_x) + return mb_y ? TOP_DC_PRED8x8 : DC_128_PRED8x8; + else + return mb_y ? mode : LEFT_DC_PRED8x8; +} + +static av_always_inline +int check_tm_pred8x8_mode(int mode, int mb_x, int mb_y, int vp7) +{ + if (!mb_x) + return mb_y ? VERT_PRED8x8 : (vp7 ? DC_128_PRED8x8 : DC_129_PRED8x8); + else + return mb_y ? mode : HOR_PRED8x8; +} + +static av_always_inline +int check_intra_pred8x8_mode_emuedge(int mode, int mb_x, int mb_y, int vp7) +{ + switch (mode) { + case DC_PRED8x8: + return check_dc_pred8x8_mode(mode, mb_x, mb_y); + case VERT_PRED8x8: + return !mb_y ? (vp7 ? DC_128_PRED8x8 : DC_127_PRED8x8) : mode; + case HOR_PRED8x8: + return !mb_x ? (vp7 ? DC_128_PRED8x8 : DC_129_PRED8x8) : mode; + case PLANE_PRED8x8: /* TM */ + return check_tm_pred8x8_mode(mode, mb_x, mb_y, vp7); + } + return mode; +} + +static av_always_inline +int check_tm_pred4x4_mode(int mode, int mb_x, int mb_y, int vp7) +{ + if (!mb_x) { + return mb_y ? VERT_VP8_PRED : (vp7 ? DC_128_PRED : DC_129_PRED); + } else { + return mb_y ? mode : HOR_VP8_PRED; + } +} + +static av_always_inline +int check_intra_pred4x4_mode_emuedge(int mode, int mb_x, int mb_y, + int *copy_buf, int vp7) +{ + switch (mode) { + case VERT_PRED: + if (!mb_x && mb_y) { + *copy_buf = 1; + return mode; + } + /* fall-through */ + case DIAG_DOWN_LEFT_PRED: + case VERT_LEFT_PRED: + return !mb_y ? (vp7 ? DC_128_PRED : DC_127_PRED) : mode; + case HOR_PRED: + if (!mb_y) { + *copy_buf = 1; + return mode; + } + /* fall-through */ + case HOR_UP_PRED: + return !mb_x ? (vp7 ? DC_128_PRED : DC_129_PRED) : mode; + case TM_VP8_PRED: + return check_tm_pred4x4_mode(mode, mb_x, mb_y, vp7); + case DC_PRED: /* 4x4 DC doesn't use the same "H.264-style" exceptions + * as 16x16/8x8 DC */ + case DIAG_DOWN_RIGHT_PRED: + case VERT_RIGHT_PRED: + case HOR_DOWN_PRED: + if (!mb_y || !mb_x) + *copy_buf = 1; + return mode; + } + return mode; +} + +static av_always_inline +void intra_predict(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], + VP8Macroblock *mb, int mb_x, int mb_y, int is_vp7) +{ + int x, y, mode, nnz; + uint32_t tr; + + /* for the first row, we need to run xchg_mb_border to init the top edge + * to 127 otherwise, skip it if we aren't going to deblock */ + if (mb_y && (s->deblock_filter || !mb_y) && td->thread_nr == 0) + xchg_mb_border(s->top_border[mb_x + 1], dst[0], dst[1], dst[2], + s->linesize, s->uvlinesize, mb_x, mb_y, s->mb_width, + s->filter.simple, 1); + + if (mb->mode < MODE_I4x4) { + mode = check_intra_pred8x8_mode_emuedge(mb->mode, mb_x, mb_y, is_vp7); + s->hpc.pred16x16[mode](dst[0], s->linesize); + } else { + uint8_t *ptr = dst[0]; + uint8_t *intra4x4 = mb->intra4x4_pred_mode_mb; + const uint8_t lo = is_vp7 ? 128 : 127; + const uint8_t hi = is_vp7 ? 128 : 129; + uint8_t tr_top[4] = { lo, lo, lo, lo }; + + // all blocks on the right edge of the macroblock use bottom edge + // the top macroblock for their topright edge + uint8_t *tr_right = ptr - s->linesize + 16; + + // if we're on the right edge of the frame, said edge is extended + // from the top macroblock + if (mb_y && mb_x == s->mb_width - 1) { + tr = tr_right[-1] * 0x01010101u; + tr_right = (uint8_t *) &tr; + } + + if (mb->skip) + AV_ZERO128(td->non_zero_count_cache); + + for (y = 0; y < 4; y++) { + uint8_t *topright = ptr + 4 - s->linesize; + for (x = 0; x < 4; x++) { + int copy = 0; + ptrdiff_t linesize = s->linesize; + uint8_t *dst = ptr + 4 * x; + LOCAL_ALIGNED(4, uint8_t, copy_dst, [5 * 8]); + + if ((y == 0 || x == 3) && mb_y == 0) { + topright = tr_top; + } else if (x == 3) + topright = tr_right; + + mode = check_intra_pred4x4_mode_emuedge(intra4x4[x], mb_x + x, + mb_y + y, ©, is_vp7); + if (copy) { + dst = copy_dst + 12; + linesize = 8; + if (!(mb_y + y)) { + copy_dst[3] = lo; + AV_WN32A(copy_dst + 4, lo * 0x01010101U); + } else { + AV_COPY32(copy_dst + 4, ptr + 4 * x - s->linesize); + if (!(mb_x + x)) { + copy_dst[3] = hi; + } else { + copy_dst[3] = ptr[4 * x - s->linesize - 1]; + } + } + if (!(mb_x + x)) { + copy_dst[11] = + copy_dst[19] = + copy_dst[27] = + copy_dst[35] = hi; + } else { + copy_dst[11] = ptr[4 * x - 1]; + copy_dst[19] = ptr[4 * x + s->linesize - 1]; + copy_dst[27] = ptr[4 * x + s->linesize * 2 - 1]; + copy_dst[35] = ptr[4 * x + s->linesize * 3 - 1]; + } + } + s->hpc.pred4x4[mode](dst, topright, linesize); + if (copy) { + AV_COPY32(ptr + 4 * x, copy_dst + 12); + AV_COPY32(ptr + 4 * x + s->linesize, copy_dst + 20); + AV_COPY32(ptr + 4 * x + s->linesize * 2, copy_dst + 28); + AV_COPY32(ptr + 4 * x + s->linesize * 3, copy_dst + 36); + } + + nnz = td->non_zero_count_cache[y][x]; + if (nnz) { + if (nnz == 1) + s->vp8dsp.vp8_idct_dc_add(ptr + 4 * x, + td->block[y][x], s->linesize); + else + s->vp8dsp.vp8_idct_add(ptr + 4 * x, + td->block[y][x], s->linesize); + } + topright += 4; + } + + ptr += 4 * s->linesize; + intra4x4 += 4; + } + } + + mode = check_intra_pred8x8_mode_emuedge(mb->chroma_pred_mode, + mb_x, mb_y, is_vp7); + s->hpc.pred8x8[mode](dst[1], s->uvlinesize); + s->hpc.pred8x8[mode](dst[2], s->uvlinesize); + + if (mb_y && (s->deblock_filter || !mb_y) && td->thread_nr == 0) + xchg_mb_border(s->top_border[mb_x + 1], dst[0], dst[1], dst[2], + s->linesize, s->uvlinesize, mb_x, mb_y, s->mb_width, + s->filter.simple, 0); +} + +static const uint8_t subpel_idx[3][8] = { + { 0, 1, 2, 1, 2, 1, 2, 1 }, // nr. of left extra pixels, + // also function pointer index + { 0, 3, 5, 3, 5, 3, 5, 3 }, // nr. of extra pixels required + { 0, 2, 3, 2, 3, 2, 3, 2 }, // nr. of right extra pixels +}; + +/** + * luma MC function + * + * @param s VP8 decoding context + * @param dst target buffer for block data at block position + * @param ref reference picture buffer at origin (0, 0) + * @param mv motion vector (relative to block position) to get pixel data from + * @param x_off horizontal position of block from origin (0, 0) + * @param y_off vertical position of block from origin (0, 0) + * @param block_w width of block (16, 8 or 4) + * @param block_h height of block (always same as block_w) + * @param width width of src/dst plane data + * @param height height of src/dst plane data + * @param linesize size of a single line of plane data, including padding + * @param mc_func motion compensation function pointers (bilinear or sixtap MC) + */ +static av_always_inline +void vp8_mc_luma(VP8Context *s, VP8ThreadData *td, uint8_t *dst, + ThreadFrame *ref, const VP56mv *mv, + int x_off, int y_off, int block_w, int block_h, + int width, int height, ptrdiff_t linesize, + vp8_mc_func mc_func[3][3]) +{ + uint8_t *src = ref->f->data[0]; + + if (AV_RN32A(mv)) { + ptrdiff_t src_linesize = linesize; + + int mx = (mv->x * 2) & 7, mx_idx = subpel_idx[0][mx]; + int my = (mv->y * 2) & 7, my_idx = subpel_idx[0][my]; + + x_off += mv->x >> 2; + y_off += mv->y >> 2; + + // edge emulation + ff_thread_await_progress(ref, (3 + y_off + block_h + subpel_idx[2][my]) >> 4, 0); + src += y_off * linesize + x_off; + if (x_off < mx_idx || x_off >= width - block_w - subpel_idx[2][mx] || + y_off < my_idx || y_off >= height - block_h - subpel_idx[2][my]) { + s->vdsp.emulated_edge_mc(td->edge_emu_buffer, + src - my_idx * linesize - mx_idx, + EDGE_EMU_LINESIZE, linesize, + block_w + subpel_idx[1][mx], + block_h + subpel_idx[1][my], + x_off - mx_idx, y_off - my_idx, + width, height); + src = td->edge_emu_buffer + mx_idx + EDGE_EMU_LINESIZE * my_idx; + src_linesize = EDGE_EMU_LINESIZE; + } + mc_func[my_idx][mx_idx](dst, linesize, src, src_linesize, block_h, mx, my); + } else { + ff_thread_await_progress(ref, (3 + y_off + block_h) >> 4, 0); + mc_func[0][0](dst, linesize, src + y_off * linesize + x_off, + linesize, block_h, 0, 0); + } +} + +/** + * chroma MC function + * + * @param s VP8 decoding context + * @param dst1 target buffer for block data at block position (U plane) + * @param dst2 target buffer for block data at block position (V plane) + * @param ref reference picture buffer at origin (0, 0) + * @param mv motion vector (relative to block position) to get pixel data from + * @param x_off horizontal position of block from origin (0, 0) + * @param y_off vertical position of block from origin (0, 0) + * @param block_w width of block (16, 8 or 4) + * @param block_h height of block (always same as block_w) + * @param width width of src/dst plane data + * @param height height of src/dst plane data + * @param linesize size of a single line of plane data, including padding + * @param mc_func motion compensation function pointers (bilinear or sixtap MC) + */ +static av_always_inline +void vp8_mc_chroma(VP8Context *s, VP8ThreadData *td, uint8_t *dst1, + uint8_t *dst2, ThreadFrame *ref, const VP56mv *mv, + int x_off, int y_off, int block_w, int block_h, + int width, int height, ptrdiff_t linesize, + vp8_mc_func mc_func[3][3]) +{ + uint8_t *src1 = ref->f->data[1], *src2 = ref->f->data[2]; + + if (AV_RN32A(mv)) { + int mx = mv->x & 7, mx_idx = subpel_idx[0][mx]; + int my = mv->y & 7, my_idx = subpel_idx[0][my]; + + x_off += mv->x >> 3; + y_off += mv->y >> 3; + + // edge emulation + src1 += y_off * linesize + x_off; + src2 += y_off * linesize + x_off; + ff_thread_await_progress(ref, (3 + y_off + block_h + subpel_idx[2][my]) >> 3, 0); + if (x_off < mx_idx || x_off >= width - block_w - subpel_idx[2][mx] || + y_off < my_idx || y_off >= height - block_h - subpel_idx[2][my]) { + s->vdsp.emulated_edge_mc(td->edge_emu_buffer, + src1 - my_idx * linesize - mx_idx, + EDGE_EMU_LINESIZE, linesize, + block_w + subpel_idx[1][mx], + block_h + subpel_idx[1][my], + x_off - mx_idx, y_off - my_idx, width, height); + src1 = td->edge_emu_buffer + mx_idx + EDGE_EMU_LINESIZE * my_idx; + mc_func[my_idx][mx_idx](dst1, linesize, src1, EDGE_EMU_LINESIZE, block_h, mx, my); + + s->vdsp.emulated_edge_mc(td->edge_emu_buffer, + src2 - my_idx * linesize - mx_idx, + EDGE_EMU_LINESIZE, linesize, + block_w + subpel_idx[1][mx], + block_h + subpel_idx[1][my], + x_off - mx_idx, y_off - my_idx, width, height); + src2 = td->edge_emu_buffer + mx_idx + EDGE_EMU_LINESIZE * my_idx; + mc_func[my_idx][mx_idx](dst2, linesize, src2, EDGE_EMU_LINESIZE, block_h, mx, my); + } else { + mc_func[my_idx][mx_idx](dst1, linesize, src1, linesize, block_h, mx, my); + mc_func[my_idx][mx_idx](dst2, linesize, src2, linesize, block_h, mx, my); + } + } else { + ff_thread_await_progress(ref, (3 + y_off + block_h) >> 3, 0); + mc_func[0][0](dst1, linesize, src1 + y_off * linesize + x_off, linesize, block_h, 0, 0); + mc_func[0][0](dst2, linesize, src2 + y_off * linesize + x_off, linesize, block_h, 0, 0); + } +} + +static av_always_inline +void vp8_mc_part(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], + ThreadFrame *ref_frame, int x_off, int y_off, + int bx_off, int by_off, int block_w, int block_h, + int width, int height, VP56mv *mv) +{ + VP56mv uvmv = *mv; + + /* Y */ + vp8_mc_luma(s, td, dst[0] + by_off * s->linesize + bx_off, + ref_frame, mv, x_off + bx_off, y_off + by_off, + block_w, block_h, width, height, s->linesize, + s->put_pixels_tab[block_w == 8]); + + /* U/V */ + if (s->profile == 3) { + /* this block only applies VP8; it is safe to check + * only the profile, as VP7 profile <= 1 */ + uvmv.x &= ~7; + uvmv.y &= ~7; + } + x_off >>= 1; + y_off >>= 1; + bx_off >>= 1; + by_off >>= 1; + width >>= 1; + height >>= 1; + block_w >>= 1; + block_h >>= 1; + vp8_mc_chroma(s, td, dst[1] + by_off * s->uvlinesize + bx_off, + dst[2] + by_off * s->uvlinesize + bx_off, ref_frame, + &uvmv, x_off + bx_off, y_off + by_off, + block_w, block_h, width, height, s->uvlinesize, + s->put_pixels_tab[1 + (block_w == 4)]); +} + +/* Fetch pixels for estimated mv 4 macroblocks ahead. + * Optimized for 64-byte cache lines. Inspired by ffh264 prefetch_motion. */ +static av_always_inline +void prefetch_motion(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, + int mb_xy, int ref) +{ + /* Don't prefetch refs that haven't been used very often this frame. */ + if (s->ref_count[ref - 1] > (mb_xy >> 5)) { + int x_off = mb_x << 4, y_off = mb_y << 4; + int mx = (mb->mv.x >> 2) + x_off + 8; + int my = (mb->mv.y >> 2) + y_off; + uint8_t **src = s->framep[ref]->tf.f->data; + int off = mx + (my + (mb_x & 3) * 4) * s->linesize + 64; + /* For threading, a ff_thread_await_progress here might be useful, but + * it actually slows down the decoder. Since a bad prefetch doesn't + * generate bad decoder output, we don't run it here. */ + s->vdsp.prefetch(src[0] + off, s->linesize, 4); + off = (mx >> 1) + ((my >> 1) + (mb_x & 7)) * s->uvlinesize + 64; + s->vdsp.prefetch(src[1] + off, src[2] - src[1], 2); + } +} + +/** + * Apply motion vectors to prediction buffer, chapter 18. + */ +static av_always_inline +void inter_predict(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], + VP8Macroblock *mb, int mb_x, int mb_y) +{ + int x_off = mb_x << 4, y_off = mb_y << 4; + int width = 16 * s->mb_width, height = 16 * s->mb_height; + ThreadFrame *ref = &s->framep[mb->ref_frame]->tf; + VP56mv *bmv = mb->bmv; + + switch (mb->partitioning) { + case VP8_SPLITMVMODE_NONE: + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 0, 0, 16, 16, width, height, &mb->mv); + break; + case VP8_SPLITMVMODE_4x4: { + int x, y; + VP56mv uvmv; + + /* Y */ + for (y = 0; y < 4; y++) { + for (x = 0; x < 4; x++) { + vp8_mc_luma(s, td, dst[0] + 4 * y * s->linesize + x * 4, + ref, &bmv[4 * y + x], + 4 * x + x_off, 4 * y + y_off, 4, 4, + width, height, s->linesize, + s->put_pixels_tab[2]); + } + } + + /* U/V */ + x_off >>= 1; + y_off >>= 1; + width >>= 1; + height >>= 1; + for (y = 0; y < 2; y++) { + for (x = 0; x < 2; x++) { + uvmv.x = mb->bmv[2 * y * 4 + 2 * x ].x + + mb->bmv[2 * y * 4 + 2 * x + 1].x + + mb->bmv[(2 * y + 1) * 4 + 2 * x ].x + + mb->bmv[(2 * y + 1) * 4 + 2 * x + 1].x; + uvmv.y = mb->bmv[2 * y * 4 + 2 * x ].y + + mb->bmv[2 * y * 4 + 2 * x + 1].y + + mb->bmv[(2 * y + 1) * 4 + 2 * x ].y + + mb->bmv[(2 * y + 1) * 4 + 2 * x + 1].y; + uvmv.x = (uvmv.x + 2 + FF_SIGNBIT(uvmv.x)) >> 2; + uvmv.y = (uvmv.y + 2 + FF_SIGNBIT(uvmv.y)) >> 2; + if (s->profile == 3) { + uvmv.x &= ~7; + uvmv.y &= ~7; + } + vp8_mc_chroma(s, td, dst[1] + 4 * y * s->uvlinesize + x * 4, + dst[2] + 4 * y * s->uvlinesize + x * 4, ref, + &uvmv, 4 * x + x_off, 4 * y + y_off, 4, 4, + width, height, s->uvlinesize, + s->put_pixels_tab[2]); + } + } + break; + } + case VP8_SPLITMVMODE_16x8: + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 0, 0, 16, 8, width, height, &bmv[0]); + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 0, 8, 16, 8, width, height, &bmv[1]); + break; + case VP8_SPLITMVMODE_8x16: + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 0, 0, 8, 16, width, height, &bmv[0]); + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 8, 0, 8, 16, width, height, &bmv[1]); + break; + case VP8_SPLITMVMODE_8x8: + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 0, 0, 8, 8, width, height, &bmv[0]); + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 8, 0, 8, 8, width, height, &bmv[1]); + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 0, 8, 8, 8, width, height, &bmv[2]); + vp8_mc_part(s, td, dst, ref, x_off, y_off, + 8, 8, 8, 8, width, height, &bmv[3]); + break; + } +} + +static av_always_inline +void idct_mb(VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], VP8Macroblock *mb) +{ + int x, y, ch; + + if (mb->mode != MODE_I4x4) { + uint8_t *y_dst = dst[0]; + for (y = 0; y < 4; y++) { + uint32_t nnz4 = AV_RL32(td->non_zero_count_cache[y]); + if (nnz4) { + if (nnz4 & ~0x01010101) { + for (x = 0; x < 4; x++) { + if ((uint8_t) nnz4 == 1) + s->vp8dsp.vp8_idct_dc_add(y_dst + 4 * x, + td->block[y][x], + s->linesize); + else if ((uint8_t) nnz4 > 1) + s->vp8dsp.vp8_idct_add(y_dst + 4 * x, + td->block[y][x], + s->linesize); + nnz4 >>= 8; + if (!nnz4) + break; + } + } else { + s->vp8dsp.vp8_idct_dc_add4y(y_dst, td->block[y], s->linesize); + } + } + y_dst += 4 * s->linesize; + } + } + + for (ch = 0; ch < 2; ch++) { + uint32_t nnz4 = AV_RL32(td->non_zero_count_cache[4 + ch]); + if (nnz4) { + uint8_t *ch_dst = dst[1 + ch]; + if (nnz4 & ~0x01010101) { + for (y = 0; y < 2; y++) { + for (x = 0; x < 2; x++) { + if ((uint8_t) nnz4 == 1) + s->vp8dsp.vp8_idct_dc_add(ch_dst + 4 * x, + td->block[4 + ch][(y << 1) + x], + s->uvlinesize); + else if ((uint8_t) nnz4 > 1) + s->vp8dsp.vp8_idct_add(ch_dst + 4 * x, + td->block[4 + ch][(y << 1) + x], + s->uvlinesize); + nnz4 >>= 8; + if (!nnz4) + goto chroma_idct_end; + } + ch_dst += 4 * s->uvlinesize; + } + } else { + s->vp8dsp.vp8_idct_dc_add4uv(ch_dst, td->block[4 + ch], s->uvlinesize); + } + } +chroma_idct_end: + ; + } +} + +static av_always_inline +void filter_level_for_mb(VP8Context *s, VP8Macroblock *mb, + VP8FilterStrength *f, int is_vp7) +{ + int interior_limit, filter_level; + + if (s->segmentation.enabled) { + filter_level = s->segmentation.filter_level[mb->segment]; + if (!s->segmentation.absolute_vals) + filter_level += s->filter.level; + } else + filter_level = s->filter.level; + + if (s->lf_delta.enabled) { + filter_level += s->lf_delta.ref[mb->ref_frame]; + filter_level += s->lf_delta.mode[mb->mode]; + } + + filter_level = av_clip_uintp2(filter_level, 6); + + interior_limit = filter_level; + if (s->filter.sharpness) { + interior_limit >>= (s->filter.sharpness + 3) >> 2; + interior_limit = FFMIN(interior_limit, 9 - s->filter.sharpness); + } + interior_limit = FFMAX(interior_limit, 1); + + f->filter_level = filter_level; + f->inner_limit = interior_limit; + f->inner_filter = is_vp7 || !mb->skip || mb->mode == MODE_I4x4 || + mb->mode == VP8_MVMODE_SPLIT; +} + +static av_always_inline +void filter_mb(VP8Context *s, uint8_t *dst[3], VP8FilterStrength *f, + int mb_x, int mb_y, int is_vp7) +{ + int mbedge_lim, bedge_lim_y, bedge_lim_uv, hev_thresh; + int filter_level = f->filter_level; + int inner_limit = f->inner_limit; + int inner_filter = f->inner_filter; + ptrdiff_t linesize = s->linesize; + ptrdiff_t uvlinesize = s->uvlinesize; + static const uint8_t hev_thresh_lut[2][64] = { + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3 }, + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2 } + }; + + if (!filter_level) + return; + + if (is_vp7) { + bedge_lim_y = filter_level; + bedge_lim_uv = filter_level * 2; + mbedge_lim = filter_level + 2; + } else { + bedge_lim_y = + bedge_lim_uv = filter_level * 2 + inner_limit; + mbedge_lim = bedge_lim_y + 4; + } + + hev_thresh = hev_thresh_lut[s->keyframe][filter_level]; + + if (mb_x) { + s->vp8dsp.vp8_h_loop_filter16y(dst[0], linesize, + mbedge_lim, inner_limit, hev_thresh); + s->vp8dsp.vp8_h_loop_filter8uv(dst[1], dst[2], uvlinesize, + mbedge_lim, inner_limit, hev_thresh); + } + +#define H_LOOP_FILTER_16Y_INNER(cond) \ + if (cond && inner_filter) { \ + s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 4, linesize, \ + bedge_lim_y, inner_limit, \ + hev_thresh); \ + s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 8, linesize, \ + bedge_lim_y, inner_limit, \ + hev_thresh); \ + s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 12, linesize, \ + bedge_lim_y, inner_limit, \ + hev_thresh); \ + s->vp8dsp.vp8_h_loop_filter8uv_inner(dst[1] + 4, dst[2] + 4, \ + uvlinesize, bedge_lim_uv, \ + inner_limit, hev_thresh); \ + } + + H_LOOP_FILTER_16Y_INNER(!is_vp7) + + if (mb_y) { + s->vp8dsp.vp8_v_loop_filter16y(dst[0], linesize, + mbedge_lim, inner_limit, hev_thresh); + s->vp8dsp.vp8_v_loop_filter8uv(dst[1], dst[2], uvlinesize, + mbedge_lim, inner_limit, hev_thresh); + } + + if (inner_filter) { + s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0] + 4 * linesize, + linesize, bedge_lim_y, + inner_limit, hev_thresh); + s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0] + 8 * linesize, + linesize, bedge_lim_y, + inner_limit, hev_thresh); + s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0] + 12 * linesize, + linesize, bedge_lim_y, + inner_limit, hev_thresh); + s->vp8dsp.vp8_v_loop_filter8uv_inner(dst[1] + 4 * uvlinesize, + dst[2] + 4 * uvlinesize, + uvlinesize, bedge_lim_uv, + inner_limit, hev_thresh); + } + + H_LOOP_FILTER_16Y_INNER(is_vp7) +} + +static av_always_inline +void filter_mb_simple(VP8Context *s, uint8_t *dst, VP8FilterStrength *f, + int mb_x, int mb_y) +{ + int mbedge_lim, bedge_lim; + int filter_level = f->filter_level; + int inner_limit = f->inner_limit; + int inner_filter = f->inner_filter; + ptrdiff_t linesize = s->linesize; + + if (!filter_level) + return; + + bedge_lim = 2 * filter_level + inner_limit; + mbedge_lim = bedge_lim + 4; + + if (mb_x) + s->vp8dsp.vp8_h_loop_filter_simple(dst, linesize, mbedge_lim); + if (inner_filter) { + s->vp8dsp.vp8_h_loop_filter_simple(dst + 4, linesize, bedge_lim); + s->vp8dsp.vp8_h_loop_filter_simple(dst + 8, linesize, bedge_lim); + s->vp8dsp.vp8_h_loop_filter_simple(dst + 12, linesize, bedge_lim); + } + + if (mb_y) + s->vp8dsp.vp8_v_loop_filter_simple(dst, linesize, mbedge_lim); + if (inner_filter) { + s->vp8dsp.vp8_v_loop_filter_simple(dst + 4 * linesize, linesize, bedge_lim); + s->vp8dsp.vp8_v_loop_filter_simple(dst + 8 * linesize, linesize, bedge_lim); + s->vp8dsp.vp8_v_loop_filter_simple(dst + 12 * linesize, linesize, bedge_lim); + } +} + +#define MARGIN (16 << 2) +static av_always_inline +int vp78_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *curframe, + VP8Frame *prev_frame, int is_vp7) +{ + VP8Context *s = avctx->priv_data; + int mb_x, mb_y; + + s->mv_bounds.mv_min.y = -MARGIN; + s->mv_bounds.mv_max.y = ((s->mb_height - 1) << 6) + MARGIN; + for (mb_y = 0; mb_y < s->mb_height; mb_y++) { + VP8Macroblock *mb = s->macroblocks_base + + ((s->mb_width + 1) * (mb_y + 1) + 1); + int mb_xy = mb_y * s->mb_width; + + AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED * 0x01010101); + + s->mv_bounds.mv_min.x = -MARGIN; + s->mv_bounds.mv_max.x = ((s->mb_width - 1) << 6) + MARGIN; + + if (vpX_rac_is_end(&s->c)) { + return AVERROR_INVALIDDATA; + } + for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) { + if (mb_y == 0) + AV_WN32A((mb - s->mb_width - 1)->intra4x4_pred_mode_top, + DC_PRED * 0x01010101); + decode_mb_mode(s, &s->mv_bounds, mb, mb_x, mb_y, curframe->seg_map->data + mb_xy, + prev_frame && prev_frame->seg_map ? + prev_frame->seg_map->data + mb_xy : NULL, 1, is_vp7); + s->mv_bounds.mv_min.x -= 64; + s->mv_bounds.mv_max.x -= 64; + } + s->mv_bounds.mv_min.y -= 64; + s->mv_bounds.mv_max.y -= 64; + } + return 0; +} + +static int vp7_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *cur_frame, + VP8Frame *prev_frame) +{ + return vp78_decode_mv_mb_modes(avctx, cur_frame, prev_frame, IS_VP7); +} + +static int vp8_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *cur_frame, + VP8Frame *prev_frame) +{ + return vp78_decode_mv_mb_modes(avctx, cur_frame, prev_frame, IS_VP8); +} + +#if HAVE_THREADS +#define check_thread_pos(td, otd, mb_x_check, mb_y_check) \ + do { \ + int tmp = (mb_y_check << 16) | (mb_x_check & 0xFFFF); \ + if (atomic_load(&otd->thread_mb_pos) < tmp) { \ + pthread_mutex_lock(&otd->lock); \ + atomic_store(&td->wait_mb_pos, tmp); \ + do { \ + if (atomic_load(&otd->thread_mb_pos) >= tmp) \ + break; \ + pthread_cond_wait(&otd->cond, &otd->lock); \ + } while (1); \ + atomic_store(&td->wait_mb_pos, INT_MAX); \ + pthread_mutex_unlock(&otd->lock); \ + } \ + } while (0) + +#define update_pos(td, mb_y, mb_x) \ + do { \ + int pos = (mb_y << 16) | (mb_x & 0xFFFF); \ + int sliced_threading = (avctx->active_thread_type == FF_THREAD_SLICE) && \ + (num_jobs > 1); \ + int is_null = !next_td || !prev_td; \ + int pos_check = (is_null) ? 1 : \ + (next_td != td && pos >= atomic_load(&next_td->wait_mb_pos)) || \ + (prev_td != td && pos >= atomic_load(&prev_td->wait_mb_pos)); \ + atomic_store(&td->thread_mb_pos, pos); \ + if (sliced_threading && pos_check) { \ + pthread_mutex_lock(&td->lock); \ + pthread_cond_broadcast(&td->cond); \ + pthread_mutex_unlock(&td->lock); \ + } \ + } while (0) +#else +#define check_thread_pos(td, otd, mb_x_check, mb_y_check) while(0) +#define update_pos(td, mb_y, mb_x) while(0) +#endif + +static av_always_inline int decode_mb_row_no_filter(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr, int is_vp7) +{ + VP8Context *s = avctx->priv_data; + VP8ThreadData *prev_td, *next_td, *td = &s->thread_data[threadnr]; + int mb_y = atomic_load(&td->thread_mb_pos) >> 16; + int mb_x, mb_xy = mb_y * s->mb_width; + int num_jobs = s->num_jobs; + VP8Frame *curframe = s->curframe, *prev_frame = s->prev_frame; + VP56RangeCoder *c = &s->coeff_partition[mb_y & (s->num_coeff_partitions - 1)]; + VP8Macroblock *mb; + uint8_t *dst[3] = { + curframe->tf.f->data[0] + 16 * mb_y * s->linesize, + curframe->tf.f->data[1] + 8 * mb_y * s->uvlinesize, + curframe->tf.f->data[2] + 8 * mb_y * s->uvlinesize + }; + + if (vpX_rac_is_end(c)) + return AVERROR_INVALIDDATA; + + if (mb_y == 0) + prev_td = td; + else + prev_td = &s->thread_data[(jobnr + num_jobs - 1) % num_jobs]; + if (mb_y == s->mb_height - 1) + next_td = td; + else + next_td = &s->thread_data[(jobnr + 1) % num_jobs]; + if (s->mb_layout == 1) + mb = s->macroblocks_base + ((s->mb_width + 1) * (mb_y + 1) + 1); + else { + // Make sure the previous frame has read its segmentation map, + // if we re-use the same map. + if (prev_frame && s->segmentation.enabled && + !s->segmentation.update_map) + ff_thread_await_progress(&prev_frame->tf, mb_y, 0); + mb = s->macroblocks + (s->mb_height - mb_y - 1) * 2; + memset(mb - 1, 0, sizeof(*mb)); // zero left macroblock + AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED * 0x01010101); + } + + if (!is_vp7 || mb_y == 0) + memset(td->left_nnz, 0, sizeof(td->left_nnz)); + + td->mv_bounds.mv_min.x = -MARGIN; + td->mv_bounds.mv_max.x = ((s->mb_width - 1) << 6) + MARGIN; + + for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) { + if (vpX_rac_is_end(c)) + return AVERROR_INVALIDDATA; + // Wait for previous thread to read mb_x+2, and reach mb_y-1. + if (prev_td != td) { + if (threadnr != 0) { + check_thread_pos(td, prev_td, + mb_x + (is_vp7 ? 2 : 1), + mb_y - (is_vp7 ? 2 : 1)); + } else { + check_thread_pos(td, prev_td, + mb_x + (is_vp7 ? 2 : 1) + s->mb_width + 3, + mb_y - (is_vp7 ? 2 : 1)); + } + } + + s->vdsp.prefetch(dst[0] + (mb_x & 3) * 4 * s->linesize + 64, + s->linesize, 4); + s->vdsp.prefetch(dst[1] + (mb_x & 7) * s->uvlinesize + 64, + dst[2] - dst[1], 2); + + if (!s->mb_layout) + decode_mb_mode(s, &td->mv_bounds, mb, mb_x, mb_y, curframe->seg_map->data + mb_xy, + prev_frame && prev_frame->seg_map ? + prev_frame->seg_map->data + mb_xy : NULL, 0, is_vp7); + + prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_PREVIOUS); + + if (!mb->skip) + decode_mb_coeffs(s, td, c, mb, s->top_nnz[mb_x], td->left_nnz, is_vp7); + + if (mb->mode <= MODE_I4x4) + intra_predict(s, td, dst, mb, mb_x, mb_y, is_vp7); + else + inter_predict(s, td, dst, mb, mb_x, mb_y); + + prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_GOLDEN); + + if (!mb->skip) { + idct_mb(s, td, dst, mb); + } else { + AV_ZERO64(td->left_nnz); + AV_WN64(s->top_nnz[mb_x], 0); // array of 9, so unaligned + + /* Reset DC block predictors if they would exist + * if the mb had coefficients */ + if (mb->mode != MODE_I4x4 && mb->mode != VP8_MVMODE_SPLIT) { + td->left_nnz[8] = 0; + s->top_nnz[mb_x][8] = 0; + } + } + + if (s->deblock_filter) + filter_level_for_mb(s, mb, &td->filter_strength[mb_x], is_vp7); + + if (s->deblock_filter && num_jobs != 1 && threadnr == num_jobs - 1) { + if (s->filter.simple) + backup_mb_border(s->top_border[mb_x + 1], dst[0], + NULL, NULL, s->linesize, 0, 1); + else + backup_mb_border(s->top_border[mb_x + 1], dst[0], + dst[1], dst[2], s->linesize, s->uvlinesize, 0); + } + + prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_GOLDEN2); + + dst[0] += 16; + dst[1] += 8; + dst[2] += 8; + td->mv_bounds.mv_min.x -= 64; + td->mv_bounds.mv_max.x -= 64; + + if (mb_x == s->mb_width + 1) { + update_pos(td, mb_y, s->mb_width + 3); + } else { + update_pos(td, mb_y, mb_x); + } + } + return 0; +} + +static int vp7_decode_mb_row_no_filter(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr) +{ + return decode_mb_row_no_filter(avctx, tdata, jobnr, threadnr, 1); +} + +static int vp8_decode_mb_row_no_filter(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr) +{ + return decode_mb_row_no_filter(avctx, tdata, jobnr, threadnr, 0); +} + +static av_always_inline void filter_mb_row(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr, int is_vp7) +{ + VP8Context *s = avctx->priv_data; + VP8ThreadData *td = &s->thread_data[threadnr]; + int mb_x, mb_y = atomic_load(&td->thread_mb_pos) >> 16, num_jobs = s->num_jobs; + AVFrame *curframe = s->curframe->tf.f; + VP8Macroblock *mb; + VP8ThreadData *prev_td, *next_td; + uint8_t *dst[3] = { + curframe->data[0] + 16 * mb_y * s->linesize, + curframe->data[1] + 8 * mb_y * s->uvlinesize, + curframe->data[2] + 8 * mb_y * s->uvlinesize + }; + + if (s->mb_layout == 1) + mb = s->macroblocks_base + ((s->mb_width + 1) * (mb_y + 1) + 1); + else + mb = s->macroblocks + (s->mb_height - mb_y - 1) * 2; + + if (mb_y == 0) + prev_td = td; + else + prev_td = &s->thread_data[(jobnr + num_jobs - 1) % num_jobs]; + if (mb_y == s->mb_height - 1) + next_td = td; + else + next_td = &s->thread_data[(jobnr + 1) % num_jobs]; + + for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb++) { + VP8FilterStrength *f = &td->filter_strength[mb_x]; + if (prev_td != td) + check_thread_pos(td, prev_td, + (mb_x + 1) + (s->mb_width + 3), mb_y - 1); + if (next_td != td) + if (next_td != &s->thread_data[0]) + check_thread_pos(td, next_td, mb_x + 1, mb_y + 1); + + if (num_jobs == 1) { + if (s->filter.simple) + backup_mb_border(s->top_border[mb_x + 1], dst[0], + NULL, NULL, s->linesize, 0, 1); + else + backup_mb_border(s->top_border[mb_x + 1], dst[0], + dst[1], dst[2], s->linesize, s->uvlinesize, 0); + } + + if (s->filter.simple) + filter_mb_simple(s, dst[0], f, mb_x, mb_y); + else + filter_mb(s, dst, f, mb_x, mb_y, is_vp7); + dst[0] += 16; + dst[1] += 8; + dst[2] += 8; + + update_pos(td, mb_y, (s->mb_width + 3) + mb_x); + } +} + +static void vp7_filter_mb_row(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr) +{ + filter_mb_row(avctx, tdata, jobnr, threadnr, 1); +} + +static void vp8_filter_mb_row(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr) +{ + filter_mb_row(avctx, tdata, jobnr, threadnr, 0); +} + +static av_always_inline +int vp78_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata, int jobnr, + int threadnr, int is_vp7) +{ + VP8Context *s = avctx->priv_data; + VP8ThreadData *td = &s->thread_data[jobnr]; + VP8ThreadData *next_td = NULL, *prev_td = NULL; + VP8Frame *curframe = s->curframe; + int mb_y, num_jobs = s->num_jobs; + int ret; + + td->thread_nr = threadnr; + td->mv_bounds.mv_min.y = -MARGIN - 64 * threadnr; + td->mv_bounds.mv_max.y = ((s->mb_height - 1) << 6) + MARGIN - 64 * threadnr; + for (mb_y = jobnr; mb_y < s->mb_height; mb_y += num_jobs) { + atomic_store(&td->thread_mb_pos, mb_y << 16); + ret = s->decode_mb_row_no_filter(avctx, tdata, jobnr, threadnr); + if (ret < 0) { + update_pos(td, s->mb_height, INT_MAX & 0xFFFF); + return ret; + } + if (s->deblock_filter) + s->filter_mb_row(avctx, tdata, jobnr, threadnr); + update_pos(td, mb_y, INT_MAX & 0xFFFF); + + td->mv_bounds.mv_min.y -= 64 * num_jobs; + td->mv_bounds.mv_max.y -= 64 * num_jobs; + + if (avctx->active_thread_type == FF_THREAD_FRAME) + ff_thread_report_progress(&curframe->tf, mb_y, 0); + } + + return 0; +} + +static int vp7_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr) +{ + return vp78_decode_mb_row_sliced(avctx, tdata, jobnr, threadnr, IS_VP7); +} + +static int vp8_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata, + int jobnr, int threadnr) +{ + return vp78_decode_mb_row_sliced(avctx, tdata, jobnr, threadnr, IS_VP8); +} + +static av_always_inline +int vp78_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt, int is_vp7) +{ + VP8Context *s = avctx->priv_data; + int ret, i, referenced, num_jobs; + enum AVDiscard skip_thresh; + VP8Frame *av_uninit(curframe), *prev_frame; + + if (is_vp7) + ret = vp7_decode_frame_header(s, avpkt->data, avpkt->size); + else + ret = vp8_decode_frame_header(s, avpkt->data, avpkt->size); + + if (ret < 0) + goto err; + + if (s->actually_webp) { + // avctx->pix_fmt already set in caller. + } else if (!is_vp7 && s->pix_fmt == AV_PIX_FMT_NONE) { + s->pix_fmt = get_pixel_format(s); + if (s->pix_fmt < 0) { + ret = AVERROR(EINVAL); + goto err; + } + avctx->pix_fmt = s->pix_fmt; + } + + prev_frame = s->framep[VP56_FRAME_CURRENT]; + + referenced = s->update_last || s->update_golden == VP56_FRAME_CURRENT || + s->update_altref == VP56_FRAME_CURRENT; + + skip_thresh = !referenced ? AVDISCARD_NONREF + : !s->keyframe ? AVDISCARD_NONKEY + : AVDISCARD_ALL; + + if (avctx->skip_frame >= skip_thresh) { + s->invisible = 1; + memcpy(&s->next_framep[0], &s->framep[0], sizeof(s->framep[0]) * 4); + goto skip_decode; + } + s->deblock_filter = s->filter.level && avctx->skip_loop_filter < skip_thresh; + + // release no longer referenced frames + for (i = 0; i < 5; i++) + if (s->frames[i].tf.f->buf[0] && + &s->frames[i] != prev_frame && + &s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] && + &s->frames[i] != s->framep[VP56_FRAME_GOLDEN] && + &s->frames[i] != s->framep[VP56_FRAME_GOLDEN2]) + vp8_release_frame(s, &s->frames[i]); + + curframe = s->framep[VP56_FRAME_CURRENT] = vp8_find_free_buffer(s); + + if (!s->colorspace) + avctx->colorspace = AVCOL_SPC_BT470BG; + if (s->fullrange) + avctx->color_range = AVCOL_RANGE_JPEG; + else + avctx->color_range = AVCOL_RANGE_MPEG; + + /* Given that arithmetic probabilities are updated every frame, it's quite + * likely that the values we have on a random interframe are complete + * junk if we didn't start decode on a keyframe. So just don't display + * anything rather than junk. */ + if (!s->keyframe && (!s->framep[VP56_FRAME_PREVIOUS] || + !s->framep[VP56_FRAME_GOLDEN] || + !s->framep[VP56_FRAME_GOLDEN2])) { + av_log(avctx, AV_LOG_WARNING, + "Discarding interframe without a prior keyframe!\n"); + ret = AVERROR_INVALIDDATA; + goto err; + } + + curframe->tf.f->key_frame = s->keyframe; + curframe->tf.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I + : AV_PICTURE_TYPE_P; + if ((ret = vp8_alloc_frame(s, curframe, referenced)) < 0) + goto err; + + // check if golden and altref are swapped + if (s->update_altref != VP56_FRAME_NONE) + s->next_framep[VP56_FRAME_GOLDEN2] = s->framep[s->update_altref]; + else + s->next_framep[VP56_FRAME_GOLDEN2] = s->framep[VP56_FRAME_GOLDEN2]; + + if (s->update_golden != VP56_FRAME_NONE) + s->next_framep[VP56_FRAME_GOLDEN] = s->framep[s->update_golden]; + else + s->next_framep[VP56_FRAME_GOLDEN] = s->framep[VP56_FRAME_GOLDEN]; + + if (s->update_last) + s->next_framep[VP56_FRAME_PREVIOUS] = curframe; + else + s->next_framep[VP56_FRAME_PREVIOUS] = s->framep[VP56_FRAME_PREVIOUS]; + + s->next_framep[VP56_FRAME_CURRENT] = curframe; + + ff_thread_finish_setup(avctx); + + if (avctx->hwaccel) { + ret = avctx->hwaccel->start_frame(avctx, avpkt->data, avpkt->size); + if (ret < 0) + goto err; + + ret = avctx->hwaccel->decode_slice(avctx, avpkt->data, avpkt->size); + if (ret < 0) + goto err; + + ret = avctx->hwaccel->end_frame(avctx); + if (ret < 0) + goto err; + + } else { + s->linesize = curframe->tf.f->linesize[0]; + s->uvlinesize = curframe->tf.f->linesize[1]; + + memset(s->top_nnz, 0, s->mb_width * sizeof(*s->top_nnz)); + /* Zero macroblock structures for top/top-left prediction + * from outside the frame. */ + if (!s->mb_layout) + memset(s->macroblocks + s->mb_height * 2 - 1, 0, + (s->mb_width + 1) * sizeof(*s->macroblocks)); + if (!s->mb_layout && s->keyframe) + memset(s->intra4x4_pred_mode_top, DC_PRED, s->mb_width * 4); + + memset(s->ref_count, 0, sizeof(s->ref_count)); + + if (s->mb_layout == 1) { + // Make sure the previous frame has read its segmentation map, + // if we re-use the same map. + if (prev_frame && s->segmentation.enabled && + !s->segmentation.update_map) + ff_thread_await_progress(&prev_frame->tf, 1, 0); + if (is_vp7) + ret = vp7_decode_mv_mb_modes(avctx, curframe, prev_frame); + else + ret = vp8_decode_mv_mb_modes(avctx, curframe, prev_frame); + if (ret < 0) + goto err; + } + + if (avctx->active_thread_type == FF_THREAD_FRAME) + num_jobs = 1; + else + num_jobs = FFMIN(s->num_coeff_partitions, avctx->thread_count); + s->num_jobs = num_jobs; + s->curframe = curframe; + s->prev_frame = prev_frame; + s->mv_bounds.mv_min.y = -MARGIN; + s->mv_bounds.mv_max.y = ((s->mb_height - 1) << 6) + MARGIN; + for (i = 0; i < MAX_THREADS; i++) { + VP8ThreadData *td = &s->thread_data[i]; + atomic_init(&td->thread_mb_pos, 0); + atomic_init(&td->wait_mb_pos, INT_MAX); + } + if (is_vp7) + avctx->execute2(avctx, vp7_decode_mb_row_sliced, s->thread_data, NULL, + num_jobs); + else + avctx->execute2(avctx, vp8_decode_mb_row_sliced, s->thread_data, NULL, + num_jobs); + } + + ff_thread_report_progress(&curframe->tf, INT_MAX, 0); + memcpy(&s->framep[0], &s->next_framep[0], sizeof(s->framep[0]) * 4); + +skip_decode: + // if future frames don't use the updated probabilities, + // reset them to the values we saved + if (!s->update_probabilities) + s->prob[0] = s->prob[1]; + + if (!s->invisible) { + if ((ret = av_frame_ref(data, curframe->tf.f)) < 0) + return ret; + *got_frame = 1; + } + + return avpkt->size; +err: + memcpy(&s->next_framep[0], &s->framep[0], sizeof(s->framep[0]) * 4); + return ret; +} + +int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) +{ + return vp78_decode_frame(avctx, data, got_frame, avpkt, IS_VP8); +} + +#if CONFIG_VP7_DECODER +static int vp7_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) +{ + return vp78_decode_frame(avctx, data, got_frame, avpkt, IS_VP7); +} +#endif /* CONFIG_VP7_DECODER */ + +av_cold int ff_vp8_decode_free(AVCodecContext *avctx) +{ + VP8Context *s = avctx->priv_data; + int i; + + if (!s) + return 0; + + vp8_decode_flush_impl(avctx, 1); + for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) + av_frame_free(&s->frames[i].tf.f); + + return 0; +} + +static av_cold int vp8_init_frames(VP8Context *s) +{ + int i; + for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) { + s->frames[i].tf.f = av_frame_alloc(); + if (!s->frames[i].tf.f) + return AVERROR(ENOMEM); + } + return 0; +} + +static av_always_inline +int vp78_decode_init(AVCodecContext *avctx, int is_vp7) +{ + VP8Context *s = avctx->priv_data; + int ret; + + s->avctx = avctx; + s->vp7 = avctx->codec->id == AV_CODEC_ID_VP7; + s->pix_fmt = AV_PIX_FMT_NONE; + avctx->pix_fmt = AV_PIX_FMT_YUV420P; + avctx->internal->allocate_progress = 1; + + ff_videodsp_init(&s->vdsp, 8); + + ff_vp78dsp_init(&s->vp8dsp); + if (CONFIG_VP7_DECODER && is_vp7) { + ff_h264_pred_init(&s->hpc, AV_CODEC_ID_VP7, 8, 1); + ff_vp7dsp_init(&s->vp8dsp); + s->decode_mb_row_no_filter = vp7_decode_mb_row_no_filter; + s->filter_mb_row = vp7_filter_mb_row; + } else if (CONFIG_VP8_DECODER && !is_vp7) { + ff_h264_pred_init(&s->hpc, AV_CODEC_ID_VP8, 8, 1); + ff_vp8dsp_init(&s->vp8dsp); + s->decode_mb_row_no_filter = vp8_decode_mb_row_no_filter; + s->filter_mb_row = vp8_filter_mb_row; + } + + /* does not change for VP8 */ + memcpy(s->prob[0].scan, ff_zigzag_scan, sizeof(s->prob[0].scan)); + + if ((ret = vp8_init_frames(s)) < 0) { + ff_vp8_decode_free(avctx); + return ret; + } + + return 0; +} + +#if CONFIG_VP7_DECODER +static int vp7_decode_init(AVCodecContext *avctx) +{ + return vp78_decode_init(avctx, IS_VP7); +} +#endif /* CONFIG_VP7_DECODER */ + +av_cold int ff_vp8_decode_init(AVCodecContext *avctx) +{ + return vp78_decode_init(avctx, IS_VP8); +} + +#if CONFIG_VP8_DECODER +#if HAVE_THREADS +static av_cold int vp8_decode_init_thread_copy(AVCodecContext *avctx) +{ + VP8Context *s = avctx->priv_data; + int ret; + + s->avctx = avctx; + + if ((ret = vp8_init_frames(s)) < 0) { + ff_vp8_decode_free(avctx); + return ret; + } + + return 0; +} + +#define REBASE(pic) ((pic) ? (pic) - &s_src->frames[0] + &s->frames[0] : NULL) + +static int vp8_decode_update_thread_context(AVCodecContext *dst, + const AVCodecContext *src) +{ + VP8Context *s = dst->priv_data, *s_src = src->priv_data; + int i; + + if (s->macroblocks_base && + (s_src->mb_width != s->mb_width || s_src->mb_height != s->mb_height)) { + free_buffers(s); + s->mb_width = s_src->mb_width; + s->mb_height = s_src->mb_height; + } + + s->pix_fmt = s_src->pix_fmt; + s->prob[0] = s_src->prob[!s_src->update_probabilities]; + s->segmentation = s_src->segmentation; + s->lf_delta = s_src->lf_delta; + memcpy(s->sign_bias, s_src->sign_bias, sizeof(s->sign_bias)); + + for (i = 0; i < FF_ARRAY_ELEMS(s_src->frames); i++) { + if (s_src->frames[i].tf.f->buf[0]) { + int ret = vp8_ref_frame(s, &s->frames[i], &s_src->frames[i]); + if (ret < 0) + return ret; + } + } + + s->framep[0] = REBASE(s_src->next_framep[0]); + s->framep[1] = REBASE(s_src->next_framep[1]); + s->framep[2] = REBASE(s_src->next_framep[2]); + s->framep[3] = REBASE(s_src->next_framep[3]); + + return 0; +} +#endif /* HAVE_THREADS */ +#endif /* CONFIG_VP8_DECODER */ + +#if CONFIG_VP7_DECODER +AVCodec ff_vp7_decoder = { + .name = "vp7", + .long_name = NULL_IF_CONFIG_SMALL("On2 VP7"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_VP7, + .priv_data_size = sizeof(VP8Context), + .init = vp7_decode_init, + .close = ff_vp8_decode_free, + .decode = vp7_decode_frame, + .capabilities = AV_CODEC_CAP_DR1, + .flush = vp8_decode_flush, +}; +#endif /* CONFIG_VP7_DECODER */ + +#if CONFIG_VP8_DECODER +AVCodec ff_vp8_decoder = { + .name = "vp8", + .long_name = NULL_IF_CONFIG_SMALL("On2 VP8"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_VP8, + .priv_data_size = sizeof(VP8Context), + .init = ff_vp8_decode_init, + .close = ff_vp8_decode_free, + .decode = ff_vp8_decode_frame, + .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | + AV_CODEC_CAP_SLICE_THREADS, + .flush = vp8_decode_flush, + .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp8_decode_init_thread_copy), + .update_thread_context = ONLY_IF_THREADS_ENABLED(vp8_decode_update_thread_context), + .hw_configs = (const AVCodecHWConfigInternal*[]) { +#if CONFIG_VP8_VAAPI_HWACCEL + HWACCEL_VAAPI(vp8), +#endif +#if CONFIG_VP8_NVDEC_HWACCEL + HWACCEL_NVDEC(vp8), +#endif + NULL + }, +}; +#endif /* CONFIG_VP7_DECODER */ |