diff options
Diffstat (limited to 'media/ffvpx/libavcodec/libvpxdec.c')
| -rw-r--r-- | media/ffvpx/libavcodec/libvpxdec.c | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/libvpxdec.c b/media/ffvpx/libavcodec/libvpxdec.c new file mode 100644 index 0000000000..c6187fd5a1 --- /dev/null +++ b/media/ffvpx/libavcodec/libvpxdec.c @@ -0,0 +1,393 @@ +/* + * Copyright (c) 2010, Google, Inc. + * + * 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 + */ + +/** + * @file + * VP8/9 decoder support via libvpx + */ + +#include "config_components.h" + +#define VPX_CODEC_DISABLE_COMPAT 1 +#include <vpx/vpx_decoder.h> +#include <vpx/vpx_frame_buffer.h> +#include <vpx/vp8dx.h> + +#include "libavutil/common.h" +#include "libavutil/cpu.h" +#include "libavutil/imgutils.h" +#include "libavutil/intreadwrite.h" +#include "avcodec.h" +#include "codec_internal.h" +#include "decode.h" +#include "libvpx.h" +#include "profiles.h" + +typedef struct VPxDecoderContext { + struct vpx_codec_ctx decoder; + struct vpx_codec_ctx decoder_alpha; + AVBufferPool *pool; + size_t pool_size; + int has_alpha_channel; +} VPxContext; + + +static int get_frame_buffer(void *priv, size_t min_size, vpx_codec_frame_buffer_t *fb) +{ + VPxContext *ctx = priv; + AVBufferRef *buf; + + if (min_size > ctx->pool_size) { + av_buffer_pool_uninit(&ctx->pool); + /* According to the libvpx docs the buffer must be zeroed out. */ + ctx->pool = av_buffer_pool_init(min_size, av_buffer_allocz); + if (!ctx->pool) { + ctx->pool_size = 0; + return AVERROR(ENOMEM); + } + ctx->pool_size = min_size; + } + + buf = av_buffer_pool_get(ctx->pool); + if (!buf) + return AVERROR(ENOMEM); + + fb->priv = buf; + fb->size = ctx->pool_size; + fb->data = buf->data; + + return 0; +} + +static int release_frame_buffer(void *priv, vpx_codec_frame_buffer_t *fb) +{ + AVBufferRef *buf = fb->priv; + av_buffer_unref(&buf); + return 0; +} + +static av_cold int vpx_init(AVCodecContext *avctx, + struct vpx_codec_ctx* decoder, + const struct vpx_codec_iface *iface) +{ + struct vpx_codec_dec_cfg deccfg = { + .threads = FFMIN(avctx->thread_count ? avctx->thread_count : av_cpu_count(), MAX_VPX_THREADS) + }; + + av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str()); + av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config()); + + if (vpx_codec_dec_init(decoder, iface, &deccfg, 0) != VPX_CODEC_OK) { + const char *error = vpx_codec_error(decoder); + av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n", + error); + return AVERROR(EINVAL); + } + + if (avctx->codec_id == AV_CODEC_ID_VP9) + vpx_codec_set_frame_buffer_functions(decoder, get_frame_buffer, release_frame_buffer, avctx->priv_data); + + return 0; +} + +// returns 0 on success, AVERROR_INVALIDDATA otherwise +static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img, + int has_alpha_channel) +{ + static const enum AVColorSpace colorspaces[8] = { + AVCOL_SPC_UNSPECIFIED, AVCOL_SPC_BT470BG, AVCOL_SPC_BT709, AVCOL_SPC_SMPTE170M, + AVCOL_SPC_SMPTE240M, AVCOL_SPC_BT2020_NCL, AVCOL_SPC_RESERVED, AVCOL_SPC_RGB, + }; +#if VPX_IMAGE_ABI_VERSION >= 4 + static const enum AVColorRange color_ranges[] = { + AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG + }; + avctx->color_range = color_ranges[img->range]; +#endif + avctx->colorspace = colorspaces[img->cs]; + if (avctx->codec_id == AV_CODEC_ID_VP8 && img->fmt != VPX_IMG_FMT_I420) + return AVERROR_INVALIDDATA; + switch (img->fmt) { + case VPX_IMG_FMT_I420: + if (avctx->codec_id == AV_CODEC_ID_VP9) + avctx->profile = AV_PROFILE_VP9_0; + avctx->pix_fmt = + has_alpha_channel ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P; + return 0; +#if CONFIG_LIBVPX_VP9_DECODER + case VPX_IMG_FMT_I422: + avctx->profile = AV_PROFILE_VP9_1; + avctx->pix_fmt = AV_PIX_FMT_YUV422P; + return 0; + case VPX_IMG_FMT_I440: + avctx->profile = AV_PROFILE_VP9_1; + avctx->pix_fmt = AV_PIX_FMT_YUV440P; + return 0; + case VPX_IMG_FMT_I444: + avctx->profile = AV_PROFILE_VP9_1; + avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? + AV_PIX_FMT_GBRP : AV_PIX_FMT_YUV444P; + return 0; + case VPX_IMG_FMT_I42016: + avctx->profile = AV_PROFILE_VP9_2; + if (img->bit_depth == 10) { + avctx->pix_fmt = AV_PIX_FMT_YUV420P10; + return 0; + } else if (img->bit_depth == 12) { + avctx->pix_fmt = AV_PIX_FMT_YUV420P12; + return 0; + } else { + return AVERROR_INVALIDDATA; + } + case VPX_IMG_FMT_I42216: + avctx->profile = AV_PROFILE_VP9_3; + if (img->bit_depth == 10) { + avctx->pix_fmt = AV_PIX_FMT_YUV422P10; + return 0; + } else if (img->bit_depth == 12) { + avctx->pix_fmt = AV_PIX_FMT_YUV422P12; + return 0; + } else { + return AVERROR_INVALIDDATA; + } + case VPX_IMG_FMT_I44016: + avctx->profile = AV_PROFILE_VP9_3; + if (img->bit_depth == 10) { + avctx->pix_fmt = AV_PIX_FMT_YUV440P10; + return 0; + } else if (img->bit_depth == 12) { + avctx->pix_fmt = AV_PIX_FMT_YUV440P12; + return 0; + } else { + return AVERROR_INVALIDDATA; + } + case VPX_IMG_FMT_I44416: + avctx->profile = AV_PROFILE_VP9_3; + if (img->bit_depth == 10) { + avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? + AV_PIX_FMT_GBRP10 : AV_PIX_FMT_YUV444P10; + return 0; + } else if (img->bit_depth == 12) { + avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? + AV_PIX_FMT_GBRP12 : AV_PIX_FMT_YUV444P12; + return 0; + } else { + return AVERROR_INVALIDDATA; + } +#endif + default: + return AVERROR_INVALIDDATA; + } +} + +static int decode_frame(AVCodecContext *avctx, vpx_codec_ctx_t *decoder, + const uint8_t *data, uint32_t data_sz) +{ + if (vpx_codec_decode(decoder, data, data_sz, NULL, 0) != VPX_CODEC_OK) { + const char *error = vpx_codec_error(decoder); + const char *detail = vpx_codec_error_detail(decoder); + + av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error); + if (detail) { + av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", + detail); + } + return AVERROR_INVALIDDATA; + } + return 0; +} + +static int vpx_decode(AVCodecContext *avctx, AVFrame *picture, + int *got_frame, AVPacket *avpkt) +{ + VPxContext *ctx = avctx->priv_data; + const void *iter = NULL; + const void *iter_alpha = NULL; + struct vpx_image *img, *img_alpha; + int ret; + uint8_t *side_data = NULL; + size_t side_data_size; + + ret = decode_frame(avctx, &ctx->decoder, avpkt->data, avpkt->size); + if (ret) + return ret; + + side_data = av_packet_get_side_data(avpkt, + AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, + &side_data_size); + if (side_data_size >= 8) { + const uint64_t additional_id = AV_RB64(side_data); + side_data += 8; + side_data_size -= 8; + if (additional_id == 1) { // 1 stands for alpha channel data. + if (!ctx->has_alpha_channel) { + ctx->has_alpha_channel = 1; + ret = vpx_init(avctx, + &ctx->decoder_alpha, +#if CONFIG_LIBVPX_VP8_DECODER && CONFIG_LIBVPX_VP9_DECODER + (avctx->codec_id == AV_CODEC_ID_VP8) ? + vpx_codec_vp8_dx() : vpx_codec_vp9_dx() +#elif CONFIG_LIBVPX_VP8_DECODER + vpx_codec_vp8_dx() +#else + vpx_codec_vp9_dx() +#endif + ); + if (ret) + return ret; + } + ret = decode_frame(avctx, &ctx->decoder_alpha, side_data, + side_data_size); + if (ret) + return ret; + } + } + + if ((img = vpx_codec_get_frame(&ctx->decoder, &iter)) && + (!ctx->has_alpha_channel || + (img_alpha = vpx_codec_get_frame(&ctx->decoder_alpha, &iter_alpha)))) { + uint8_t *planes[4]; + int linesizes[4]; + + if (img->d_w > img->w || img->d_h > img->h) { + av_log(avctx, AV_LOG_ERROR, "Display dimensions %dx%d exceed storage %dx%d\n", + img->d_w, img->d_h, img->w, img->h); + return AVERROR_EXTERNAL; + } + + if ((ret = set_pix_fmt(avctx, img, ctx->has_alpha_channel)) < 0) { + av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n", + img->fmt, img->bit_depth); + return ret; + } + + if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) { + av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n", + avctx->width, avctx->height, img->d_w, img->d_h); + ret = ff_set_dimensions(avctx, img->d_w, img->d_h); + if (ret < 0) + return ret; + } + + if (ctx->has_alpha_channel && + (img->d_w != img_alpha->d_w || + img->d_h != img_alpha->d_h || + img->bit_depth != img_alpha->bit_depth)) { + av_log(avctx, AV_LOG_ERROR, + "Video dimensions %dx%d@%dbpc differ from alpha dimensions %dx%d@%dbpc\n", + img->d_w, img->d_h, img->bit_depth, + img_alpha->d_w, img_alpha->d_h, img_alpha->bit_depth); + return AVERROR_INVALIDDATA; + } + + planes[0] = img->planes[VPX_PLANE_Y]; + planes[1] = img->planes[VPX_PLANE_U]; + planes[2] = img->planes[VPX_PLANE_V]; + planes[3] = + ctx->has_alpha_channel ? img_alpha->planes[VPX_PLANE_Y] : NULL; + linesizes[0] = img->stride[VPX_PLANE_Y]; + linesizes[1] = img->stride[VPX_PLANE_U]; + linesizes[2] = img->stride[VPX_PLANE_V]; + linesizes[3] = + ctx->has_alpha_channel ? img_alpha->stride[VPX_PLANE_Y] : 0; + + if (img->fb_priv && (!ctx->has_alpha_channel || img_alpha->fb_priv)) { + ret = ff_decode_frame_props(avctx, picture); + if (ret < 0) + return ret; + picture->buf[0] = av_buffer_ref(img->fb_priv); + if (!picture->buf[0]) + return AVERROR(ENOMEM); + if (ctx->has_alpha_channel) { + picture->buf[1] = av_buffer_ref(img_alpha->fb_priv); + if (!picture->buf[1]) + return AVERROR(ENOMEM); + } + for (int i = 0; i < 4; i++) { + picture->data[i] = planes[i]; + picture->linesize[i] = linesizes[i]; + } + } else { + if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) + return ret; + av_image_copy2(picture->data, picture->linesize, planes, + linesizes, avctx->pix_fmt, img->d_w, img->d_h); + } + *got_frame = 1; + } + return avpkt->size; +} + +static av_cold int vpx_free(AVCodecContext *avctx) +{ + VPxContext *ctx = avctx->priv_data; + vpx_codec_destroy(&ctx->decoder); + if (ctx->has_alpha_channel) + vpx_codec_destroy(&ctx->decoder_alpha); + av_buffer_pool_uninit(&ctx->pool); + return 0; +} + +#if CONFIG_LIBVPX_VP8_DECODER +static av_cold int vp8_init(AVCodecContext *avctx) +{ + VPxContext *ctx = avctx->priv_data; + return vpx_init(avctx, &ctx->decoder, vpx_codec_vp8_dx()); +} + +const FFCodec ff_libvpx_vp8_decoder = { + .p.name = "libvpx", + CODEC_LONG_NAME("libvpx VP8"), + .p.type = AVMEDIA_TYPE_VIDEO, + .p.id = AV_CODEC_ID_VP8, + .p.capabilities = AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_DR1, + .p.wrapper_name = "libvpx", + .priv_data_size = sizeof(VPxContext), + .init = vp8_init, + .close = vpx_free, + FF_CODEC_DECODE_CB(vpx_decode), + .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE | + FF_CODEC_CAP_AUTO_THREADS, +}; +#endif /* CONFIG_LIBVPX_VP8_DECODER */ + +#if CONFIG_LIBVPX_VP9_DECODER +static av_cold int vp9_init(AVCodecContext *avctx) +{ + VPxContext *ctx = avctx->priv_data; + return vpx_init(avctx, &ctx->decoder, vpx_codec_vp9_dx()); +} + +const FFCodec ff_libvpx_vp9_decoder = { + .p.name = "libvpx-vp9", + CODEC_LONG_NAME("libvpx VP9"), + .p.type = AVMEDIA_TYPE_VIDEO, + .p.id = AV_CODEC_ID_VP9, + .p.capabilities = AV_CODEC_CAP_OTHER_THREADS, + .p.profiles = NULL_IF_CONFIG_SMALL(ff_vp9_profiles), + .p.wrapper_name = "libvpx", + .priv_data_size = sizeof(VPxContext), + .init = vp9_init, + .close = vpx_free, + FF_CODEC_DECODE_CB(vpx_decode), + .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE | + FF_CODEC_CAP_AUTO_THREADS, +}; +#endif /* CONFIG_LIBVPX_VP9_DECODER */ |