diff options
Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/decode.c | 1687 |
1 files changed, 1687 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/decode.c b/media/ffvpx/libavcodec/decode.c new file mode 100644 index 0000000000..be2be81089 --- /dev/null +++ b/media/ffvpx/libavcodec/decode.c @@ -0,0 +1,1687 @@ +/* + * generic decoding-related code + * + * 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 <stdint.h> +#include <string.h> + +#include "config.h" + +#if CONFIG_ICONV +# include <iconv.h> +#endif + +#include "libavutil/avassert.h" +#include "libavutil/avstring.h" +#include "libavutil/bprint.h" +#include "libavutil/channel_layout.h" +#include "libavutil/common.h" +#include "libavutil/fifo.h" +#include "libavutil/frame.h" +#include "libavutil/hwcontext.h" +#include "libavutil/imgutils.h" +#include "libavutil/internal.h" +#include "libavutil/intmath.h" +#include "libavutil/opt.h" + +#include "avcodec.h" +#include "bytestream.h" +#include "bsf.h" +#include "codec_internal.h" +#include "decode.h" +#include "hwconfig.h" +#include "internal.h" +#include "thread.h" + +static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt) +{ + int ret; + size_t size; + const uint8_t *data; + uint32_t flags; + int64_t val; + + data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size); + if (!data) + return 0; + + if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) { + av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter " + "changes, but PARAM_CHANGE side data was sent to it.\n"); + ret = AVERROR(EINVAL); + goto fail2; + } + + if (size < 4) + goto fail; + + flags = bytestream_get_le32(&data); + size -= 4; + +#if FF_API_OLD_CHANNEL_LAYOUT +FF_DISABLE_DEPRECATION_WARNINGS + if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { + if (size < 4) + goto fail; + val = bytestream_get_le32(&data); + if (val <= 0 || val > INT_MAX) { + av_log(avctx, AV_LOG_ERROR, "Invalid channel count"); + ret = AVERROR_INVALIDDATA; + goto fail2; + } + avctx->channels = val; + size -= 4; + } + if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { + if (size < 8) + goto fail; + avctx->channel_layout = bytestream_get_le64(&data); + size -= 8; + } +FF_ENABLE_DEPRECATION_WARNINGS +#endif + if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { + if (size < 4) + goto fail; + val = bytestream_get_le32(&data); + if (val <= 0 || val > INT_MAX) { + av_log(avctx, AV_LOG_ERROR, "Invalid sample rate"); + ret = AVERROR_INVALIDDATA; + goto fail2; + } + avctx->sample_rate = val; + size -= 4; + } + if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { + if (size < 8) + goto fail; + avctx->width = bytestream_get_le32(&data); + avctx->height = bytestream_get_le32(&data); + size -= 8; + ret = ff_set_dimensions(avctx, avctx->width, avctx->height); + if (ret < 0) + goto fail2; + } + + return 0; +fail: + av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n"); + ret = AVERROR_INVALIDDATA; +fail2: + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n"); + if (avctx->err_recognition & AV_EF_EXPLODE) + return ret; + } + return 0; +} + +static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt) +{ + int ret = 0; + + av_packet_unref(avci->last_pkt_props); + if (pkt) { + ret = av_packet_copy_props(avci->last_pkt_props, pkt); + if (!ret) + avci->last_pkt_props->opaque = (void *)(intptr_t)pkt->size; // Needed for ff_decode_frame_props(). + } + return ret; +} + +static int decode_bsfs_init(AVCodecContext *avctx) +{ + AVCodecInternal *avci = avctx->internal; + const FFCodec *const codec = ffcodec(avctx->codec); + int ret; + + if (avci->bsf) + return 0; + + ret = av_bsf_list_parse_str(codec->bsfs, &avci->bsf); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", codec->bsfs, av_err2str(ret)); + if (ret != AVERROR(ENOMEM)) + ret = AVERROR_BUG; + goto fail; + } + + /* We do not currently have an API for passing the input timebase into decoders, + * but no filters used here should actually need it. + * So we make up some plausible-looking number (the MPEG 90kHz timebase) */ + avci->bsf->time_base_in = (AVRational){ 1, 90000 }; + ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx); + if (ret < 0) + goto fail; + + ret = av_bsf_init(avci->bsf); + if (ret < 0) + goto fail; + + return 0; +fail: + av_bsf_free(&avci->bsf); + return ret; +} + +int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt) +{ + AVCodecInternal *avci = avctx->internal; + int ret; + + if (avci->draining) + return AVERROR_EOF; + + ret = av_bsf_receive_packet(avci->bsf, pkt); + if (ret == AVERROR_EOF) + avci->draining = 1; + if (ret < 0) + return ret; + + if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { + ret = extract_packet_props(avctx->internal, pkt); + if (ret < 0) + goto finish; + } + + ret = apply_param_change(avctx, pkt); + if (ret < 0) + goto finish; + + return 0; +finish: + av_packet_unref(pkt); + return ret; +} + +/** + * Attempt to guess proper monotonic timestamps for decoded video frames + * which might have incorrect times. Input timestamps may wrap around, in + * which case the output will as well. + * + * @param pts the pts field of the decoded AVPacket, as passed through + * AVFrame.pts + * @param dts the dts field of the decoded AVPacket + * @return one of the input values, may be AV_NOPTS_VALUE + */ +static int64_t guess_correct_pts(AVCodecContext *ctx, + int64_t reordered_pts, int64_t dts) +{ + int64_t pts = AV_NOPTS_VALUE; + + if (dts != AV_NOPTS_VALUE) { + ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts; + ctx->pts_correction_last_dts = dts; + } else if (reordered_pts != AV_NOPTS_VALUE) + ctx->pts_correction_last_dts = reordered_pts; + + if (reordered_pts != AV_NOPTS_VALUE) { + ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts; + ctx->pts_correction_last_pts = reordered_pts; + } else if(dts != AV_NOPTS_VALUE) + ctx->pts_correction_last_pts = dts; + + if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE) + && reordered_pts != AV_NOPTS_VALUE) + pts = reordered_pts; + else + pts = dts; + + return pts; +} + +/* + * The core of the receive_frame_wrapper for the decoders implementing + * the simple API. Certain decoders might consume partial packets without + * returning any output, so this function needs to be called in a loop until it + * returns EAGAIN. + **/ +static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples) +{ + AVCodecInternal *avci = avctx->internal; + AVPacket *const pkt = avci->in_pkt; + const FFCodec *const codec = ffcodec(avctx->codec); + int got_frame, actual_got_frame; + int ret; + + if (!pkt->data && !avci->draining) { + av_packet_unref(pkt); + ret = ff_decode_get_packet(avctx, pkt); + if (ret < 0 && ret != AVERROR_EOF) + return ret; + } + + // Some codecs (at least wma lossless) will crash when feeding drain packets + // after EOF was signaled. + if (avci->draining_done) + return AVERROR_EOF; + + if (!pkt->data && + !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY || + avctx->active_thread_type & FF_THREAD_FRAME)) + return AVERROR_EOF; + + got_frame = 0; + + if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) { + ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt); + } else { + ret = codec->cb.decode(avctx, frame, &got_frame, pkt); + + if (!(codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS)) + frame->pkt_dts = pkt->dts; + if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { + if(!avctx->has_b_frames) + frame->pkt_pos = pkt->pos; + //FIXME these should be under if(!avctx->has_b_frames) + /* get_buffer is supposed to set frame parameters */ + if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) { + if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio; + if (!frame->width) frame->width = avctx->width; + if (!frame->height) frame->height = avctx->height; + if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt; + } + } + } + emms_c(); + actual_got_frame = got_frame; + + if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { + if (frame->flags & AV_FRAME_FLAG_DISCARD) + got_frame = 0; + } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { + uint8_t *side; + size_t side_size; + uint32_t discard_padding = 0; + uint8_t skip_reason = 0; + uint8_t discard_reason = 0; + + if (ret >= 0 && got_frame) { + if (frame->format == AV_SAMPLE_FMT_NONE) + frame->format = avctx->sample_fmt; + if (!frame->ch_layout.nb_channels) { + int ret2 = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout); + if (ret2 < 0) { + ret = ret2; + got_frame = 0; + } + } +#if FF_API_OLD_CHANNEL_LAYOUT +FF_DISABLE_DEPRECATION_WARNINGS + if (!frame->channel_layout) + frame->channel_layout = avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? + avctx->ch_layout.u.mask : 0; + if (!frame->channels) + frame->channels = avctx->ch_layout.nb_channels; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + if (!frame->sample_rate) + frame->sample_rate = avctx->sample_rate; + } + + side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size); + if(side && side_size>=10) { + avci->skip_samples = AV_RL32(side); + avci->skip_samples = FFMAX(0, avci->skip_samples); + discard_padding = AV_RL32(side + 4); + av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n", + avci->skip_samples, (int)discard_padding); + skip_reason = AV_RL8(side + 8); + discard_reason = AV_RL8(side + 9); + } + + if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame && + !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { + avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples); + got_frame = 0; + *discarded_samples += frame->nb_samples; + } + + if (avci->skip_samples > 0 && got_frame && + !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { + if(frame->nb_samples <= avci->skip_samples){ + got_frame = 0; + *discarded_samples += frame->nb_samples; + avci->skip_samples -= frame->nb_samples; + av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n", + avci->skip_samples); + } else { + av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples, + frame->nb_samples - avci->skip_samples, avctx->ch_layout.nb_channels, frame->format); + if(avctx->pkt_timebase.num && avctx->sample_rate) { + int64_t diff_ts = av_rescale_q(avci->skip_samples, + (AVRational){1, avctx->sample_rate}, + avctx->pkt_timebase); + if(frame->pts!=AV_NOPTS_VALUE) + frame->pts += diff_ts; + if(frame->pkt_dts!=AV_NOPTS_VALUE) + frame->pkt_dts += diff_ts; + if (frame->duration >= diff_ts) + frame->duration -= diff_ts; + } else { + av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n"); + } + av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n", + avci->skip_samples, frame->nb_samples); + *discarded_samples += avci->skip_samples; + frame->nb_samples -= avci->skip_samples; + avci->skip_samples = 0; + } + } + + if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame && + !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { + if (discard_padding == frame->nb_samples) { + *discarded_samples += frame->nb_samples; + got_frame = 0; + } else { + if(avctx->pkt_timebase.num && avctx->sample_rate) { + int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding, + (AVRational){1, avctx->sample_rate}, + avctx->pkt_timebase); + frame->duration = diff_ts; + } else { + av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n"); + } + av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n", + (int)discard_padding, frame->nb_samples); + frame->nb_samples -= discard_padding; + } + } + + if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) { + AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10); + if (fside) { + AV_WL32(fside->data, avci->skip_samples); + AV_WL32(fside->data + 4, discard_padding); + AV_WL8(fside->data + 8, skip_reason); + AV_WL8(fside->data + 9, discard_reason); + avci->skip_samples = 0; + } + } + } + + if (avctx->codec->type == AVMEDIA_TYPE_AUDIO && + !avci->showed_multi_packet_warning && + ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) { + av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n"); + avci->showed_multi_packet_warning = 1; + } + + if (!got_frame) + av_frame_unref(frame); + + if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO) + ret = pkt->size; + + /* do not stop draining when actual_got_frame != 0 or ret < 0 */ + /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */ + if (avci->draining && !actual_got_frame) { + if (ret < 0) { + /* prevent infinite loop if a decoder wrongly always return error on draining */ + /* reasonable nb_errors_max = maximum b frames + thread count */ + int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ? + avctx->thread_count : 1); + + if (avci->nb_draining_errors++ >= nb_errors_max) { + av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. " + "Stop draining and force EOF.\n"); + avci->draining_done = 1; + ret = AVERROR_BUG; + } + } else { + avci->draining_done = 1; + } + } + + if (ret >= pkt->size || ret < 0) { + av_packet_unref(pkt); + } else { + int consumed = ret; + + pkt->data += consumed; + pkt->size -= consumed; + pkt->pts = AV_NOPTS_VALUE; + pkt->dts = AV_NOPTS_VALUE; + if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { + // See extract_packet_props() comment. + avci->last_pkt_props->opaque = (void *)((intptr_t)avci->last_pkt_props->opaque - consumed); + avci->last_pkt_props->pts = AV_NOPTS_VALUE; + avci->last_pkt_props->dts = AV_NOPTS_VALUE; + } + } + + if (got_frame) + av_assert0(frame->buf[0]); + + return ret < 0 ? ret : 0; +} + +#if CONFIG_LCMS2 +static int detect_colorspace(AVCodecContext *avctx, AVFrame *frame) +{ + AVCodecInternal *avci = avctx->internal; + enum AVColorTransferCharacteristic trc; + AVColorPrimariesDesc coeffs; + enum AVColorPrimaries prim; + cmsHPROFILE profile; + AVFrameSideData *sd; + int ret; + if (!(avctx->flags2 & AV_CODEC_FLAG2_ICC_PROFILES)) + return 0; + + sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE); + if (!sd || !sd->size) + return 0; + + if (!avci->icc.avctx) { + ret = ff_icc_context_init(&avci->icc, avctx); + if (ret < 0) + return ret; + } + + profile = cmsOpenProfileFromMemTHR(avci->icc.ctx, sd->data, sd->size); + if (!profile) + return AVERROR_INVALIDDATA; + + ret = ff_icc_profile_read_primaries(&avci->icc, profile, &coeffs); + if (!ret) + ret = ff_icc_profile_detect_transfer(&avci->icc, profile, &trc); + cmsCloseProfile(profile); + if (ret < 0) + return ret; + + prim = av_csp_primaries_id_from_desc(&coeffs); + if (prim != AVCOL_PRI_UNSPECIFIED) + frame->color_primaries = prim; + if (trc != AVCOL_TRC_UNSPECIFIED) + frame->color_trc = trc; + return 0; +} +#else /* !CONFIG_LCMS2 */ +static int detect_colorspace(av_unused AVCodecContext *c, av_unused AVFrame *f) +{ + return 0; +} +#endif + +static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame) +{ + int ret; + int64_t discarded_samples = 0; + + while (!frame->buf[0]) { + if (discarded_samples > avctx->max_samples) + return AVERROR(EAGAIN); + ret = decode_simple_internal(avctx, frame, &discarded_samples); + if (ret < 0) + return ret; + } + + return 0; +} + +static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame) +{ + AVCodecInternal *avci = avctx->internal; + const FFCodec *const codec = ffcodec(avctx->codec); + int ret, ok; + + av_assert0(!frame->buf[0]); + + if (codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME) { + ret = codec->cb.receive_frame(avctx, frame); + } else + ret = decode_simple_receive_frame(avctx, frame); + + if (ret == AVERROR_EOF) + avci->draining_done = 1; + + /* preserve ret */ + ok = detect_colorspace(avctx, frame); + if (ok < 0) { + av_frame_unref(frame); + return ok; + } + + if (!ret) { + frame->best_effort_timestamp = guess_correct_pts(avctx, + frame->pts, + frame->pkt_dts); + +#if FF_API_PKT_DURATION +FF_DISABLE_DEPRECATION_WARNINGS + frame->pkt_duration = frame->duration; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + + /* the only case where decode data is not set should be decoders + * that do not call ff_get_buffer() */ + av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) || + !(avctx->codec->capabilities & AV_CODEC_CAP_DR1)); + + if (frame->private_ref) { + FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data; + + if (fdd->post_process) { + ret = fdd->post_process(avctx, frame); + if (ret < 0) { + av_frame_unref(frame); + return ret; + } + } + } + } + + /* free the per-frame decode data */ + av_buffer_unref(&frame->private_ref); + + return ret; +} + +int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt) +{ + AVCodecInternal *avci = avctx->internal; + int ret; + + if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) + return AVERROR(EINVAL); + + if (avctx->internal->draining) + return AVERROR_EOF; + + if (avpkt && !avpkt->size && avpkt->data) + return AVERROR(EINVAL); + + av_packet_unref(avci->buffer_pkt); + if (avpkt && (avpkt->data || avpkt->side_data_elems)) { + ret = av_packet_ref(avci->buffer_pkt, avpkt); + if (ret < 0) + return ret; + } + + ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt); + if (ret < 0) { + av_packet_unref(avci->buffer_pkt); + return ret; + } + + if (!avci->buffer_frame->buf[0]) { + ret = decode_receive_frame_internal(avctx, avci->buffer_frame); + if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) + return ret; + } + + return 0; +} + +static int apply_cropping(AVCodecContext *avctx, AVFrame *frame) +{ + /* make sure we are noisy about decoders returning invalid cropping data */ + if (frame->crop_left >= INT_MAX - frame->crop_right || + frame->crop_top >= INT_MAX - frame->crop_bottom || + (frame->crop_left + frame->crop_right) >= frame->width || + (frame->crop_top + frame->crop_bottom) >= frame->height) { + av_log(avctx, AV_LOG_WARNING, + "Invalid cropping information set by a decoder: " + "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" " + "(frame size %dx%d). This is a bug, please report it\n", + frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom, + frame->width, frame->height); + frame->crop_left = 0; + frame->crop_right = 0; + frame->crop_top = 0; + frame->crop_bottom = 0; + return 0; + } + + if (!avctx->apply_cropping) + return 0; + + return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ? + AV_FRAME_CROP_UNALIGNED : 0); +} + +// make sure frames returned to the caller are valid +static int frame_validate(AVCodecContext *avctx, AVFrame *frame) +{ + if (!frame->buf[0] || frame->format < 0) + goto fail; + + switch (avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: + if (frame->width <= 0 || frame->height <= 0) + goto fail; + break; + case AVMEDIA_TYPE_AUDIO: + if (!av_channel_layout_check(&frame->ch_layout) || + frame->sample_rate <= 0) + goto fail; + + break; + default: av_assert0(0); + } + + return 0; +fail: + av_log(avctx, AV_LOG_ERROR, "An invalid frame was output by a decoder. " + "This is a bug, please report it.\n"); + return AVERROR_BUG; +} + +int ff_decode_receive_frame(AVCodecContext *avctx, AVFrame *frame) +{ + AVCodecInternal *avci = avctx->internal; + int ret, changed; + + if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) + return AVERROR(EINVAL); + + if (avci->buffer_frame->buf[0]) { + av_frame_move_ref(frame, avci->buffer_frame); + } else { + ret = decode_receive_frame_internal(avctx, frame); + if (ret < 0) + return ret; + } + + ret = frame_validate(avctx, frame); + if (ret < 0) + goto fail; + + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { + ret = apply_cropping(avctx, frame); + if (ret < 0) + goto fail; + } + + avctx->frame_num++; +#if FF_API_AVCTX_FRAME_NUMBER +FF_DISABLE_DEPRECATION_WARNINGS + avctx->frame_number = avctx->frame_num; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + + if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) { + + if (avctx->frame_num == 1) { + avci->initial_format = frame->format; + switch(avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: + avci->initial_width = frame->width; + avci->initial_height = frame->height; + break; + case AVMEDIA_TYPE_AUDIO: + avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate : + avctx->sample_rate; + ret = av_channel_layout_copy(&avci->initial_ch_layout, &frame->ch_layout); + if (ret < 0) + goto fail; + break; + } + } + + if (avctx->frame_num > 1) { + changed = avci->initial_format != frame->format; + + switch(avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: + changed |= avci->initial_width != frame->width || + avci->initial_height != frame->height; + break; + case AVMEDIA_TYPE_AUDIO: + changed |= avci->initial_sample_rate != frame->sample_rate || + avci->initial_sample_rate != avctx->sample_rate || + av_channel_layout_compare(&avci->initial_ch_layout, &frame->ch_layout); + break; + } + + if (changed) { + avci->changed_frames_dropped++; + av_log(avctx, AV_LOG_INFO, "dropped changed frame #%"PRId64" pts %"PRId64 + " drop count: %d \n", + avctx->frame_num, frame->pts, + avci->changed_frames_dropped); + ret = AVERROR_INPUT_CHANGED; + goto fail; + } + } + } + return 0; +fail: + av_frame_unref(frame); + return ret; +} + +static void get_subtitle_defaults(AVSubtitle *sub) +{ + memset(sub, 0, sizeof(*sub)); + sub->pts = AV_NOPTS_VALUE; +} + +#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */ +static int recode_subtitle(AVCodecContext *avctx, const AVPacket **outpkt, + const AVPacket *inpkt, AVPacket *buf_pkt) +{ +#if CONFIG_ICONV + iconv_t cd = (iconv_t)-1; + int ret = 0; + char *inb, *outb; + size_t inl, outl; +#endif + + if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) { + *outpkt = inpkt; + return 0; + } + +#if CONFIG_ICONV + inb = inpkt->data; + inl = inpkt->size; + + if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) { + av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n"); + return AVERROR(ERANGE); + } + + cd = iconv_open("UTF-8", avctx->sub_charenc); + av_assert0(cd != (iconv_t)-1); + + ret = av_new_packet(buf_pkt, inl * UTF8_MAX_BYTES); + if (ret < 0) + goto end; + ret = av_packet_copy_props(buf_pkt, inpkt); + if (ret < 0) + goto end; + outb = buf_pkt->data; + outl = buf_pkt->size; + + if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 || + iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 || + outl >= buf_pkt->size || inl != 0) { + ret = FFMIN(AVERROR(errno), -1); + av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" " + "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc); + goto end; + } + buf_pkt->size -= outl; + memset(buf_pkt->data + buf_pkt->size, 0, outl); + *outpkt = buf_pkt; + + ret = 0; +end: + if (ret < 0) + av_packet_unref(buf_pkt); + if (cd != (iconv_t)-1) + iconv_close(cd); + return ret; +#else + av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv"); + return AVERROR(EINVAL); +#endif +} + +static int utf8_check(const uint8_t *str) +{ + const uint8_t *byte; + uint32_t codepoint, min; + + while (*str) { + byte = str; + GET_UTF8(codepoint, *(byte++), return 0;); + min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 : + 1 << (5 * (byte - str) - 4); + if (codepoint < min || codepoint >= 0x110000 || + codepoint == 0xFFFE /* BOM */ || + codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */) + return 0; + str = byte; + } + return 1; +} + +int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, + int *got_sub_ptr, const AVPacket *avpkt) +{ + int ret = 0; + + if (!avpkt->data && avpkt->size) { + av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n"); + return AVERROR(EINVAL); + } + if (!avctx->codec) + return AVERROR(EINVAL); + if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) { + av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n"); + return AVERROR(EINVAL); + } + + *got_sub_ptr = 0; + get_subtitle_defaults(sub); + + if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) { + AVCodecInternal *avci = avctx->internal; + const AVPacket *pkt; + + ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt); + if (ret < 0) + return ret; + + if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE) + sub->pts = av_rescale_q(avpkt->pts, + avctx->pkt_timebase, AV_TIME_BASE_Q); + ret = ffcodec(avctx->codec)->cb.decode_sub(avctx, sub, got_sub_ptr, pkt); + if (pkt == avci->buffer_pkt) // did we recode? + av_packet_unref(avci->buffer_pkt); + if (ret < 0) { + *got_sub_ptr = 0; + avsubtitle_free(sub); + return ret; + } + av_assert1(!sub->num_rects || *got_sub_ptr); + + if (sub->num_rects && !sub->end_display_time && avpkt->duration && + avctx->pkt_timebase.num) { + AVRational ms = { 1, 1000 }; + sub->end_display_time = av_rescale_q(avpkt->duration, + avctx->pkt_timebase, ms); + } + + if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) + sub->format = 0; + else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB) + sub->format = 1; + + for (unsigned i = 0; i < sub->num_rects; i++) { + if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE && + sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) { + av_log(avctx, AV_LOG_ERROR, + "Invalid UTF-8 in decoded subtitles text; " + "maybe missing -sub_charenc option\n"); + avsubtitle_free(sub); + *got_sub_ptr = 0; + return AVERROR_INVALIDDATA; + } + } + + if (*got_sub_ptr) + avctx->frame_num++; +#if FF_API_AVCTX_FRAME_NUMBER +FF_DISABLE_DEPRECATION_WARNINGS + avctx->frame_number = avctx->frame_num; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + } + + return ret; +} + +enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx, + const enum AVPixelFormat *fmt) +{ + const AVPixFmtDescriptor *desc; + const AVCodecHWConfig *config; + int i, n; + + // If a device was supplied when the codec was opened, assume that the + // user wants to use it. + if (avctx->hw_device_ctx && ffcodec(avctx->codec)->hw_configs) { + AVHWDeviceContext *device_ctx = + (AVHWDeviceContext*)avctx->hw_device_ctx->data; + for (i = 0;; i++) { + config = &ffcodec(avctx->codec)->hw_configs[i]->public; + if (!config) + break; + if (!(config->methods & + AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)) + continue; + if (device_ctx->type != config->device_type) + continue; + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { + if (config->pix_fmt == fmt[n]) + return fmt[n]; + } + } + } + // No device or other setup, so we have to choose from things which + // don't any other external information. + + // If the last element of the list is a software format, choose it + // (this should be best software format if any exist). + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); + desc = av_pix_fmt_desc_get(fmt[n - 1]); + if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) + return fmt[n - 1]; + + // Finally, traverse the list in order and choose the first entry + // with no external dependencies (if there is no hardware configuration + // information available then this just picks the first entry). + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { + for (i = 0;; i++) { + config = avcodec_get_hw_config(avctx->codec, i); + if (!config) + break; + if (config->pix_fmt == fmt[n]) + break; + } + if (!config) { + // No specific config available, so the decoder must be able + // to handle this format without any additional setup. + return fmt[n]; + } + if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { + // Usable with only internal setup. + return fmt[n]; + } + } + + // Nothing is usable, give up. + return AV_PIX_FMT_NONE; +} + +int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx, + enum AVHWDeviceType dev_type) +{ + AVHWDeviceContext *device_ctx; + AVHWFramesContext *frames_ctx; + int ret; + + if (!avctx->hwaccel) + return AVERROR(ENOSYS); + + if (avctx->hw_frames_ctx) + return 0; + if (!avctx->hw_device_ctx) { + av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is " + "required for hardware accelerated decoding.\n"); + return AVERROR(EINVAL); + } + + device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data; + if (device_ctx->type != dev_type) { + av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware " + "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type), + av_hwdevice_get_type_name(device_ctx->type)); + return AVERROR(EINVAL); + } + + ret = avcodec_get_hw_frames_parameters(avctx, + avctx->hw_device_ctx, + avctx->hwaccel->pix_fmt, + &avctx->hw_frames_ctx); + if (ret < 0) + return ret; + + frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data; + + + if (frames_ctx->initial_pool_size) { + // We guarantee 4 base work surfaces. The function above guarantees 1 + // (the absolute minimum), so add the missing count. + frames_ctx->initial_pool_size += 3; + } + + ret = av_hwframe_ctx_init(avctx->hw_frames_ctx); + if (ret < 0) { + av_buffer_unref(&avctx->hw_frames_ctx); + return ret; + } + + return 0; +} + +int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, + AVBufferRef *device_ref, + enum AVPixelFormat hw_pix_fmt, + AVBufferRef **out_frames_ref) +{ + AVBufferRef *frames_ref = NULL; + const AVCodecHWConfigInternal *hw_config; + const AVHWAccel *hwa; + int i, ret; + + for (i = 0;; i++) { + hw_config = ffcodec(avctx->codec)->hw_configs[i]; + if (!hw_config) + return AVERROR(ENOENT); + if (hw_config->public.pix_fmt == hw_pix_fmt) + break; + } + + hwa = hw_config->hwaccel; + if (!hwa || !hwa->frame_params) + return AVERROR(ENOENT); + + frames_ref = av_hwframe_ctx_alloc(device_ref); + if (!frames_ref) + return AVERROR(ENOMEM); + + ret = hwa->frame_params(avctx, frames_ref); + if (ret >= 0) { + AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data; + + if (frames_ctx->initial_pool_size) { + // If the user has requested that extra output surfaces be + // available then add them here. + if (avctx->extra_hw_frames > 0) + frames_ctx->initial_pool_size += avctx->extra_hw_frames; + + // If frame threading is enabled then an extra surface per thread + // is also required. + if (avctx->active_thread_type & FF_THREAD_FRAME) + frames_ctx->initial_pool_size += avctx->thread_count; + } + + *out_frames_ref = frames_ref; + } else { + av_buffer_unref(&frames_ref); + } + return ret; +} + +static int hwaccel_init(AVCodecContext *avctx, + const AVCodecHWConfigInternal *hw_config) +{ + const AVHWAccel *hwaccel; + int err; + + hwaccel = hw_config->hwaccel; + if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL && + avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { + av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n", + hwaccel->name); + return AVERROR_PATCHWELCOME; + } + + if (hwaccel->priv_data_size) { + avctx->internal->hwaccel_priv_data = + av_mallocz(hwaccel->priv_data_size); + if (!avctx->internal->hwaccel_priv_data) + return AVERROR(ENOMEM); + } + + avctx->hwaccel = hwaccel; + if (hwaccel->init) { + err = hwaccel->init(avctx); + if (err < 0) { + av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: " + "hwaccel initialisation returned error.\n", + av_get_pix_fmt_name(hw_config->public.pix_fmt)); + av_freep(&avctx->internal->hwaccel_priv_data); + avctx->hwaccel = NULL; + return err; + } + } + + return 0; +} + +static void hwaccel_uninit(AVCodecContext *avctx) +{ + if (avctx->hwaccel && avctx->hwaccel->uninit) + avctx->hwaccel->uninit(avctx); + + av_freep(&avctx->internal->hwaccel_priv_data); + + avctx->hwaccel = NULL; + + av_buffer_unref(&avctx->hw_frames_ctx); +} + +int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt) +{ + const AVPixFmtDescriptor *desc; + enum AVPixelFormat *choices; + enum AVPixelFormat ret, user_choice; + const AVCodecHWConfigInternal *hw_config; + const AVCodecHWConfig *config; + int i, n, err; + + // Find end of list. + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); + // Must contain at least one entry. + av_assert0(n >= 1); + // If a software format is available, it must be the last entry. + desc = av_pix_fmt_desc_get(fmt[n - 1]); + if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) { + // No software format is available. + } else { + avctx->sw_pix_fmt = fmt[n - 1]; + } + + choices = av_memdup(fmt, (n + 1) * sizeof(*choices)); + if (!choices) + return AV_PIX_FMT_NONE; + + for (;;) { + // Remove the previous hwaccel, if there was one. + hwaccel_uninit(avctx); + + user_choice = avctx->get_format(avctx, choices); + if (user_choice == AV_PIX_FMT_NONE) { + // Explicitly chose nothing, give up. + ret = AV_PIX_FMT_NONE; + break; + } + + desc = av_pix_fmt_desc_get(user_choice); + if (!desc) { + av_log(avctx, AV_LOG_ERROR, "Invalid format returned by " + "get_format() callback.\n"); + ret = AV_PIX_FMT_NONE; + break; + } + av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n", + desc->name); + + for (i = 0; i < n; i++) { + if (choices[i] == user_choice) + break; + } + if (i == n) { + av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): " + "%s not in possible list.\n", desc->name); + ret = AV_PIX_FMT_NONE; + break; + } + + if (ffcodec(avctx->codec)->hw_configs) { + for (i = 0;; i++) { + hw_config = ffcodec(avctx->codec)->hw_configs[i]; + if (!hw_config) + break; + if (hw_config->public.pix_fmt == user_choice) + break; + } + } else { + hw_config = NULL; + } + + if (!hw_config) { + // No config available, so no extra setup required. + ret = user_choice; + break; + } + config = &hw_config->public; + + if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX && + avctx->hw_frames_ctx) { + const AVHWFramesContext *frames_ctx = + (AVHWFramesContext*)avctx->hw_frames_ctx->data; + if (frames_ctx->format != user_choice) { + av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " + "does not match the format of the provided frames " + "context.\n", desc->name); + goto try_again; + } + } else if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && + avctx->hw_device_ctx) { + const AVHWDeviceContext *device_ctx = + (AVHWDeviceContext*)avctx->hw_device_ctx->data; + if (device_ctx->type != config->device_type) { + av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " + "does not match the type of the provided device " + "context.\n", desc->name); + goto try_again; + } + } else if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { + // Internal-only setup, no additional configuration. + } else if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_AD_HOC) { + // Some ad-hoc configuration we can't see and can't check. + } else { + av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " + "missing configuration.\n", desc->name); + goto try_again; + } + if (hw_config->hwaccel) { + av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel " + "initialisation.\n", desc->name); + err = hwaccel_init(avctx, hw_config); + if (err < 0) + goto try_again; + } + ret = user_choice; + break; + + try_again: + av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying " + "get_format() without it.\n", desc->name); + for (i = 0; i < n; i++) { + if (choices[i] == user_choice) + break; + } + for (; i + 1 < n; i++) + choices[i] = choices[i + 1]; + --n; + } + + av_freep(&choices); + return ret; +} + +static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame) +{ + size_t size; + const uint8_t *side_metadata; + + AVDictionary **frame_md = &frame->metadata; + + side_metadata = av_packet_get_side_data(avpkt, + AV_PKT_DATA_STRINGS_METADATA, &size); + return av_packet_unpack_dictionary(side_metadata, size, frame_md); +} + +int ff_decode_frame_props_from_pkt(const AVCodecContext *avctx, + AVFrame *frame, const AVPacket *pkt) +{ + static const struct { + enum AVPacketSideDataType packet; + enum AVFrameSideDataType frame; + } sd[] = { + { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN }, + { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX }, + { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL }, + { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D }, + { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE }, + { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA }, + { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL }, + { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC }, + { AV_PKT_DATA_ICC_PROFILE, AV_FRAME_DATA_ICC_PROFILE }, + { AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE }, + { AV_PKT_DATA_DYNAMIC_HDR10_PLUS, AV_FRAME_DATA_DYNAMIC_HDR_PLUS }, + }; + + frame->pts = pkt->pts; + frame->pkt_pos = pkt->pos; + frame->duration = pkt->duration; + frame->pkt_size = pkt->size; + + for (int i = 0; i < FF_ARRAY_ELEMS(sd); i++) { + size_t size; + uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size); + if (packet_sd) { + AVFrameSideData *frame_sd = av_frame_new_side_data(frame, + sd[i].frame, + size); + if (!frame_sd) + return AVERROR(ENOMEM); + + memcpy(frame_sd->data, packet_sd, size); + } + } + add_metadata_from_side_data(pkt, frame); + + if (pkt->flags & AV_PKT_FLAG_DISCARD) { + frame->flags |= AV_FRAME_FLAG_DISCARD; + } else { + frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD); + } + + if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) { + int ret = av_buffer_replace(&frame->opaque_ref, pkt->opaque_ref); + if (ret < 0) + return ret; + frame->opaque = pkt->opaque; + } + + return 0; +} + +int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame) +{ + const AVPacket *pkt = avctx->internal->last_pkt_props; + + if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { + int ret = ff_decode_frame_props_from_pkt(avctx, frame, pkt); + if (ret < 0) + return ret; + frame->pkt_size = (int)(intptr_t)pkt->opaque; + } +#if FF_API_REORDERED_OPAQUE +FF_DISABLE_DEPRECATION_WARNINGS + frame->reordered_opaque = avctx->reordered_opaque; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + + if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED) + frame->color_primaries = avctx->color_primaries; + if (frame->color_trc == AVCOL_TRC_UNSPECIFIED) + frame->color_trc = avctx->color_trc; + if (frame->colorspace == AVCOL_SPC_UNSPECIFIED) + frame->colorspace = avctx->colorspace; + if (frame->color_range == AVCOL_RANGE_UNSPECIFIED) + frame->color_range = avctx->color_range; + if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED) + frame->chroma_location = avctx->chroma_sample_location; + + switch (avctx->codec->type) { + case AVMEDIA_TYPE_VIDEO: + frame->format = avctx->pix_fmt; + if (!frame->sample_aspect_ratio.num) + frame->sample_aspect_ratio = avctx->sample_aspect_ratio; + + if (frame->width && frame->height && + av_image_check_sar(frame->width, frame->height, + frame->sample_aspect_ratio) < 0) { + av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n", + frame->sample_aspect_ratio.num, + frame->sample_aspect_ratio.den); + frame->sample_aspect_ratio = (AVRational){ 0, 1 }; + } + + break; + case AVMEDIA_TYPE_AUDIO: + if (!frame->sample_rate) + frame->sample_rate = avctx->sample_rate; + if (frame->format < 0) + frame->format = avctx->sample_fmt; + if (!frame->ch_layout.nb_channels) { + int ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout); + if (ret < 0) + return ret; + } +#if FF_API_OLD_CHANNEL_LAYOUT +FF_DISABLE_DEPRECATION_WARNINGS + frame->channels = frame->ch_layout.nb_channels; + frame->channel_layout = frame->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? + frame->ch_layout.u.mask : 0; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + break; + } + return 0; +} + +static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame) +{ + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { + int i; + int num_planes = av_pix_fmt_count_planes(frame->format); + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); + int flags = desc ? desc->flags : 0; + if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL)) + num_planes = 2; + for (i = 0; i < num_planes; i++) { + av_assert0(frame->data[i]); + } + // For formats without data like hwaccel allow unused pointers to be non-NULL. + for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) { + if (frame->data[i]) + av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n"); + frame->data[i] = NULL; + } + } +} + +static void decode_data_free(void *opaque, uint8_t *data) +{ + FrameDecodeData *fdd = (FrameDecodeData*)data; + + if (fdd->post_process_opaque_free) + fdd->post_process_opaque_free(fdd->post_process_opaque); + + if (fdd->hwaccel_priv_free) + fdd->hwaccel_priv_free(fdd->hwaccel_priv); + + av_freep(&fdd); +} + +int ff_attach_decode_data(AVFrame *frame) +{ + AVBufferRef *fdd_buf; + FrameDecodeData *fdd; + + av_assert1(!frame->private_ref); + av_buffer_unref(&frame->private_ref); + + fdd = av_mallocz(sizeof(*fdd)); + if (!fdd) + return AVERROR(ENOMEM); + + fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free, + NULL, AV_BUFFER_FLAG_READONLY); + if (!fdd_buf) { + av_freep(&fdd); + return AVERROR(ENOMEM); + } + + frame->private_ref = fdd_buf; + + return 0; +} + +int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) +{ + const AVHWAccel *hwaccel = avctx->hwaccel; + int override_dimensions = 1; + int ret; + + av_assert0(av_codec_is_decoder(avctx->codec)); + + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { + if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN || + (ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) { + av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n"); + ret = AVERROR(EINVAL); + goto fail; + } + + if (frame->width <= 0 || frame->height <= 0) { + frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres)); + frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres)); + override_dimensions = 0; + } + + if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) { + av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n"); + ret = AVERROR(EINVAL); + goto fail; + } + } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) { +#if FF_API_OLD_CHANNEL_LAYOUT +FF_DISABLE_DEPRECATION_WARNINGS + /* compat layer for old-style get_buffer() implementations */ + avctx->channels = avctx->ch_layout.nb_channels; + avctx->channel_layout = (avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) ? + avctx->ch_layout.u.mask : 0; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + + if (frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels > avctx->max_samples) { + av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples); + ret = AVERROR(EINVAL); + goto fail; + } + } + ret = ff_decode_frame_props(avctx, frame); + if (ret < 0) + goto fail; + + if (hwaccel) { + if (hwaccel->alloc_frame) { + ret = hwaccel->alloc_frame(avctx, frame); + goto end; + } + } else + avctx->sw_pix_fmt = avctx->pix_fmt; + + ret = avctx->get_buffer2(avctx, frame, flags); + if (ret < 0) + goto fail; + + validate_avframe_allocation(avctx, frame); + + ret = ff_attach_decode_data(frame); + if (ret < 0) + goto fail; + +end: + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions && + !(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) { + frame->width = avctx->width; + frame->height = avctx->height; + } + +fail: + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + av_frame_unref(frame); + } + + return ret; +} + +static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags) +{ + AVFrame *tmp; + int ret; + + av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO); + + if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) { + av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n", + frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); + av_frame_unref(frame); + } + + if (!frame->data[0]) + return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); + + if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || av_frame_is_writable(frame)) + return ff_decode_frame_props(avctx, frame); + + tmp = av_frame_alloc(); + if (!tmp) + return AVERROR(ENOMEM); + + av_frame_move_ref(tmp, frame); + + ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); + if (ret < 0) { + av_frame_free(&tmp); + return ret; + } + + av_frame_copy(frame, tmp); + av_frame_free(&tmp); + + return 0; +} + +int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) +{ + int ret = reget_buffer_internal(avctx, frame, flags); + if (ret < 0) + av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); + return ret; +} + +int ff_decode_preinit(AVCodecContext *avctx) +{ + AVCodecInternal *avci = avctx->internal; + int ret = 0; + + /* if the decoder init function was already called previously, + * free the already allocated subtitle_header before overwriting it */ + av_freep(&avctx->subtitle_header); + + if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) { + av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n", + avctx->codec->max_lowres); + avctx->lowres = avctx->codec->max_lowres; + } + if (avctx->sub_charenc) { + if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) { + av_log(avctx, AV_LOG_ERROR, "Character encoding is only " + "supported with subtitles codecs\n"); + return AVERROR(EINVAL); + } else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) { + av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, " + "subtitles character encoding will be ignored\n", + avctx->codec_descriptor->name); + avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING; + } else { + /* input character encoding is set for a text based subtitle + * codec at this point */ + if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC) + avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER; + + if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) { +#if CONFIG_ICONV + iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc); + if (cd == (iconv_t)-1) { + ret = AVERROR(errno); + av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context " + "with input character encoding \"%s\"\n", avctx->sub_charenc); + return ret; + } + iconv_close(cd); +#else + av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles " + "conversion needs a libavcodec built with iconv support " + "for this codec\n"); + return AVERROR(ENOSYS); +#endif + } + } + } + + avctx->pts_correction_num_faulty_pts = + avctx->pts_correction_num_faulty_dts = 0; + avctx->pts_correction_last_pts = + avctx->pts_correction_last_dts = INT64_MIN; + + if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY + && avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO) + av_log(avctx, AV_LOG_WARNING, + "gray decoding requested but not enabled at configuration time\n"); + if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) { + avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS; + } + + avci->in_pkt = av_packet_alloc(); + avci->last_pkt_props = av_packet_alloc(); + if (!avci->in_pkt || !avci->last_pkt_props) + return AVERROR(ENOMEM); + + ret = decode_bsfs_init(avctx); + if (ret < 0) + return ret; + + return 0; +} + +int ff_copy_palette(void *dst, const AVPacket *src, void *logctx) +{ + size_t size; + const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size); + + if (pal && size == AVPALETTE_SIZE) { + memcpy(dst, pal, AVPALETTE_SIZE); + return 1; + } else if (pal) { + av_log(logctx, AV_LOG_ERROR, + "Palette size %"SIZE_SPECIFIER" is wrong\n", size); + } + return 0; +} |