/* * 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 #include #include "config.h" #if CONFIG_ICONV # include #endif #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/bprint.h" #include "libavutil/common.h" #include "libavutil/frame.h" #include "libavutil/hwcontext.h" #include "libavutil/imgutils.h" #include "libavutil/internal.h" #include "libavutil/intmath.h" #include "avcodec.h" #include "bytestream.h" #include "decode.h" #include "internal.h" #include "thread.h" static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt) { int size = 0, ret; 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 (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; } 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->size = pkt->size; // HACK: Needed for ff_init_buffer_info(). } return ret; } static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame) { int ret; /* move the original frame to our backup */ av_frame_unref(avci->to_free); av_frame_move_ref(avci->to_free, frame); /* now copy everything except the AVBufferRefs back * note that we make a COPY of the side data, so calling av_frame_free() on * the caller's frame will work properly */ ret = av_frame_copy_props(frame, avci->to_free); if (ret < 0) return ret; memcpy(frame->data, avci->to_free->data, sizeof(frame->data)); memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize)); if (avci->to_free->extended_data != avci->to_free->data) { int planes = avci->to_free->channels; int size = planes * sizeof(*frame->extended_data); if (!size) { av_frame_unref(frame); return AVERROR_BUG; } frame->extended_data = av_malloc(size); if (!frame->extended_data) { av_frame_unref(frame); return AVERROR(ENOMEM); } memcpy(frame->extended_data, avci->to_free->extended_data, size); } else frame->extended_data = frame->data; frame->format = avci->to_free->format; frame->width = avci->to_free->width; frame->height = avci->to_free->height; frame->channel_layout = avci->to_free->channel_layout; frame->nb_samples = avci->to_free->nb_samples; frame->channels = avci->to_free->channels; return 0; } static int bsfs_init(AVCodecContext *avctx) { AVCodecInternal *avci = avctx->internal; DecodeFilterContext *s = &avci->filter; const char *bsfs_str; int ret; if (s->nb_bsfs) return 0; bsfs_str = avctx->codec->bsfs ? avctx->codec->bsfs : "null"; while (bsfs_str && *bsfs_str) { AVBSFContext **tmp; const AVBitStreamFilter *filter; char *bsf; bsf = av_get_token(&bsfs_str, ","); if (!bsf) { ret = AVERROR(ENOMEM); goto fail; } filter = av_bsf_get_by_name(bsf); if (!filter) { av_log(avctx, AV_LOG_ERROR, "A non-existing bitstream filter %s " "requested by a decoder. This is a bug, please report it.\n", bsf); ret = AVERROR_BUG; av_freep(&bsf); goto fail; } av_freep(&bsf); tmp = av_realloc_array(s->bsfs, s->nb_bsfs + 1, sizeof(*s->bsfs)); if (!tmp) { ret = AVERROR(ENOMEM); goto fail; } s->bsfs = tmp; s->nb_bsfs++; ret = av_bsf_alloc(filter, &s->bsfs[s->nb_bsfs - 1]); if (ret < 0) goto fail; if (s->nb_bsfs == 1) { /* 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) */ s->bsfs[s->nb_bsfs - 1]->time_base_in = (AVRational){ 1, 90000 }; ret = avcodec_parameters_from_context(s->bsfs[s->nb_bsfs - 1]->par_in, avctx); } else { s->bsfs[s->nb_bsfs - 1]->time_base_in = s->bsfs[s->nb_bsfs - 2]->time_base_out; ret = avcodec_parameters_copy(s->bsfs[s->nb_bsfs - 1]->par_in, s->bsfs[s->nb_bsfs - 2]->par_out); } if (ret < 0) goto fail; ret = av_bsf_init(s->bsfs[s->nb_bsfs - 1]); if (ret < 0) goto fail; } return 0; fail: ff_decode_bsfs_uninit(avctx); return ret; } /* try to get one output packet from the filter chain */ static int bsfs_poll(AVCodecContext *avctx, AVPacket *pkt) { DecodeFilterContext *s = &avctx->internal->filter; int idx, ret; /* start with the last filter in the chain */ idx = s->nb_bsfs - 1; while (idx >= 0) { /* request a packet from the currently selected filter */ ret = av_bsf_receive_packet(s->bsfs[idx], pkt); if (ret == AVERROR(EAGAIN)) { /* no packets available, try the next filter up the chain */ ret = 0; idx--; continue; } else if (ret < 0 && ret != AVERROR_EOF) { return ret; } /* got a packet or EOF -- pass it to the caller or to the next filter * down the chain */ if (idx == s->nb_bsfs - 1) { return ret; } else { idx++; ret = av_bsf_send_packet(s->bsfs[idx], ret < 0 ? NULL : pkt); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Error pre-processing a packet before decoding\n"); av_packet_unref(pkt); return ret; } } } return AVERROR(EAGAIN); } int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt) { AVCodecInternal *avci = avctx->internal; int ret; if (avci->draining) return AVERROR_EOF; ret = bsfs_poll(avctx, pkt); if (ret == AVERROR_EOF) avci->draining = 1; if (ret < 0) return ret; ret = extract_packet_props(avctx->internal, pkt); if (ret < 0) goto finish; ret = apply_param_change(avctx, pkt); if (ret < 0) goto finish; if (avctx->codec->receive_frame) avci->compat_decode_consumed += pkt->size; 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 int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame) { AVCodecInternal *avci = avctx->internal; DecodeSimpleContext *ds = &avci->ds; AVPacket *pkt = ds->in_pkt; // copy to ensure we do not change pkt 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 = avctx->codec->decode(avctx, frame, &got_frame, pkt); if (!(avctx->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; if (got_frame) frame->best_effort_timestamp = guess_correct_pts(avctx, frame->pts, frame->pkt_dts); } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { uint8_t *side; int side_size; uint32_t discard_padding = 0; uint8_t skip_reason = 0; uint8_t discard_reason = 0; if (ret >= 0 && got_frame) { frame->best_effort_timestamp = guess_correct_pts(avctx, frame->pts, frame->pkt_dts); if (frame->format == AV_SAMPLE_FMT_NONE) frame->format = avctx->sample_fmt; if (!frame->channel_layout) frame->channel_layout = avctx->channel_layout; if (!frame->channels) frame->channels = avctx->channels; 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) { avctx->internal->skip_samples = AV_RL32(side) * avctx->internal->skip_samples_multiplier; discard_padding = AV_RL32(side + 4); av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n", avctx->internal->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)) { avctx->internal->skip_samples = FFMAX(0, avctx->internal->skip_samples - frame->nb_samples); got_frame = 0; } if (avctx->internal->skip_samples > 0 && got_frame && !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { if(frame->nb_samples <= avctx->internal->skip_samples){ got_frame = 0; avctx->internal->skip_samples -= frame->nb_samples; av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n", avctx->internal->skip_samples); } else { av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples, frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format); if(avctx->pkt_timebase.num && avctx->sample_rate) { int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples, (AVRational){1, avctx->sample_rate}, avctx->pkt_timebase); if(frame->pts!=AV_NOPTS_VALUE) frame->pts += diff_ts; #if FF_API_PKT_PTS FF_DISABLE_DEPRECATION_WARNINGS if(frame->pkt_pts!=AV_NOPTS_VALUE) frame->pkt_pts += diff_ts; FF_ENABLE_DEPRECATION_WARNINGS #endif if(frame->pkt_dts!=AV_NOPTS_VALUE) frame->pkt_dts += diff_ts; if (frame->pkt_duration >= diff_ts) frame->pkt_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", avctx->internal->skip_samples, frame->nb_samples); frame->nb_samples -= avctx->internal->skip_samples; avctx->internal->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) { 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->pkt_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, avctx->internal->skip_samples); AV_WL32(fside->data + 4, discard_padding); AV_WL8(fside->data + 8, skip_reason); AV_WL8(fside->data + 9, discard_reason); avctx->internal->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 && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED)) ret = pkt->size; #if FF_API_AVCTX_TIMEBASE if (avctx->framerate.num > 0 && avctx->framerate.den > 0) avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1})); #endif /* 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 (avctx->internal->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; } } avci->compat_decode_consumed += ret; if (ret >= pkt->size || ret < 0) { av_packet_unref(pkt); } else { int consumed = ret; pkt->data += consumed; pkt->size -= consumed; avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment. pkt->pts = AV_NOPTS_VALUE; pkt->dts = AV_NOPTS_VALUE; 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; } static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame) { int ret; while (!frame->buf[0]) { ret = decode_simple_internal(avctx, frame); if (ret < 0) return ret; } return 0; } static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame) { AVCodecInternal *avci = avctx->internal; int ret; av_assert0(!frame->buf[0]); if (avctx->codec->receive_frame) ret = avctx->codec->receive_frame(avctx, frame); else ret = decode_simple_receive_frame(avctx, frame); if (ret == AVERROR_EOF) avci->draining_done = 1; if (!ret) { /* 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); ret = bsfs_init(avctx); if (ret < 0) return ret; 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->filter.bsfs[0], 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); } int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame) { AVCodecInternal *avci = avctx->internal; int ret; av_frame_unref(frame); if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) return AVERROR(EINVAL); ret = bsfs_init(avctx); if (ret < 0) return ret; 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; } if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { ret = apply_cropping(avctx, frame); if (ret < 0) { av_frame_unref(frame); return ret; } } avctx->frame_number++; return 0; } static int compat_decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, const AVPacket *pkt) { AVCodecInternal *avci = avctx->internal; int ret = 0; av_assert0(avci->compat_decode_consumed == 0); *got_frame = 0; avci->compat_decode = 1; if (avci->compat_decode_partial_size > 0 && avci->compat_decode_partial_size != pkt->size) { av_log(avctx, AV_LOG_ERROR, "Got unexpected packet size after a partial decode\n"); ret = AVERROR(EINVAL); goto finish; } if (!avci->compat_decode_partial_size) { ret = avcodec_send_packet(avctx, pkt); if (ret == AVERROR_EOF) ret = 0; else if (ret == AVERROR(EAGAIN)) { /* we fully drain all the output in each decode call, so this should not * ever happen */ ret = AVERROR_BUG; goto finish; } else if (ret < 0) goto finish; } while (ret >= 0) { ret = avcodec_receive_frame(avctx, frame); if (ret < 0) { if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) ret = 0; goto finish; } if (frame != avci->compat_decode_frame) { if (!avctx->refcounted_frames) { ret = unrefcount_frame(avci, frame); if (ret < 0) goto finish; } *got_frame = 1; frame = avci->compat_decode_frame; } else { if (!avci->compat_decode_warned) { av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* " "API cannot return all the frames for this decoder. " "Some frames will be dropped. Update your code to the " "new decoding API to fix this.\n"); avci->compat_decode_warned = 1; } } if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size)) break; } finish: if (ret == 0) { /* if there are any bsfs then assume full packet is always consumed */ if (avctx->codec->bsfs) ret = pkt->size; else ret = FFMIN(avci->compat_decode_consumed, pkt->size); } avci->compat_decode_consumed = 0; avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0; return ret; } int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt) { return compat_decode(avctx, picture, got_picture_ptr, avpkt); } int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt) { return compat_decode(avctx, frame, got_frame_ptr, avpkt); } 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, AVPacket *outpkt, const AVPacket *inpkt) { #if CONFIG_ICONV iconv_t cd = (iconv_t)-1; int ret = 0; char *inb, *outb; size_t inl, outl; AVPacket tmp; #endif if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) return 0; #if CONFIG_ICONV cd = iconv_open("UTF-8", avctx->sub_charenc); av_assert0(cd != (iconv_t)-1); 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"); ret = AVERROR(ENOMEM); goto end; } ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES); if (ret < 0) goto end; outpkt->buf = tmp.buf; outpkt->data = tmp.data; outpkt->size = tmp.size; outb = outpkt->data; outl = outpkt->size; if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 || iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 || outl >= outpkt->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); av_packet_unref(&tmp); goto end; } outpkt->size -= outl; memset(outpkt->data + outpkt->size, 0, outl); end: 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; } #if FF_API_ASS_TIMING static void insert_ts(AVBPrint *buf, int ts) { if (ts == -1) { av_bprintf(buf, "9:59:59.99,"); } else { int h, m, s; h = ts/360000; ts -= 360000*h; m = ts/ 6000; ts -= 6000*m; s = ts/ 100; ts -= 100*s; av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts); } } static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb) { int i; AVBPrint buf; av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); for (i = 0; i < sub->num_rects; i++) { char *final_dialog; const char *dialog; AVSubtitleRect *rect = sub->rects[i]; int ts_start, ts_duration = -1; long int layer; if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10)) continue; av_bprint_clear(&buf); /* skip ReadOrder */ dialog = strchr(rect->ass, ','); if (!dialog) continue; dialog++; /* extract Layer or Marked */ layer = strtol(dialog, (char**)&dialog, 10); if (*dialog != ',') continue; dialog++; /* rescale timing to ASS time base (ms) */ ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100)); if (pkt->duration != -1) ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100)); sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration); /* construct ASS (standalone file form with timestamps) string */ av_bprintf(&buf, "Dialogue: %ld,", layer); insert_ts(&buf, ts_start); insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration); av_bprintf(&buf, "%s\r\n", dialog); final_dialog = av_strdup(buf.str); if (!av_bprint_is_complete(&buf) || !final_dialog) { av_freep(&final_dialog); av_bprint_finalize(&buf, NULL); return AVERROR(ENOMEM); } av_freep(&rect->ass); rect->ass = final_dialog; } av_bprint_finalize(&buf, NULL); return 0; } #endif int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt) { int i, 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) { AVPacket pkt_recoded = *avpkt; ret = recode_subtitle(avctx, &pkt_recoded, avpkt); if (ret < 0) { *got_sub_ptr = 0; } else { ret = extract_packet_props(avctx->internal, &pkt_recoded); 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 = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded); av_assert1((ret >= 0) >= !!*got_sub_ptr && !!*got_sub_ptr >= !!sub->num_rects); #if FF_API_ASS_TIMING if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS && *got_sub_ptr && sub->num_rects) { const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase : avctx->time_base; int err = convert_sub_to_old_ass_form(sub, avpkt, tb); if (err < 0) ret = err; } #endif 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 (i = 0; i < sub->num_rects; i++) { if (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); ret = AVERROR_INVALIDDATA; break; } } if (avpkt->data != pkt_recoded.data) { // did we recode? /* prevent from destroying side data from original packet */ pkt_recoded.side_data = NULL; pkt_recoded.side_data_elems = 0; av_packet_unref(&pkt_recoded); } } if (*got_sub_ptr) avctx->frame_number++; } return ret; } static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); return desc->flags & AV_PIX_FMT_FLAG_HWACCEL; } enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt) { while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt)) ++fmt; return fmt[0]; } static AVHWAccel *find_hwaccel(AVCodecContext *avctx, enum AVPixelFormat pix_fmt) { AVHWAccel *hwaccel = NULL; const AVClass *av_class = (avctx->codec->caps_internal & FF_CODEC_CAP_HWACCEL_REQUIRE_CLASS) ? avctx->codec->priv_class : NULL; while ((hwaccel = av_hwaccel_next(hwaccel))) { if (hwaccel->decoder_class == av_class && hwaccel->id == avctx->codec_id && hwaccel->pix_fmt == pix_fmt) return hwaccel; } return NULL; } static int setup_hwaccel(AVCodecContext *avctx, const enum AVPixelFormat fmt, const char *name) { AVHWAccel *hwa = find_hwaccel(avctx, fmt); int ret = 0; if (!hwa) { av_log(avctx, AV_LOG_ERROR, "Could not find an AVHWAccel for the pixel format: %s\n", name); return AVERROR(ENOENT); } if (hwa->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n", hwa->name); return AVERROR_PATCHWELCOME; } if (hwa->priv_data_size) { avctx->internal->hwaccel_priv_data = av_mallocz(hwa->priv_data_size); if (!avctx->internal->hwaccel_priv_data) return AVERROR(ENOMEM); } avctx->hwaccel = hwa; if (hwa->init) { ret = hwa->init(avctx); if (ret < 0) { av_freep(&avctx->internal->hwaccel_priv_data); avctx->hwaccel = NULL; return ret; } } return 0; } int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt) { const AVPixFmtDescriptor *desc; enum AVPixelFormat *choices; enum AVPixelFormat ret; unsigned n = 0; while (fmt[n] != AV_PIX_FMT_NONE) ++n; av_assert0(n >= 1); avctx->sw_pix_fmt = fmt[n - 1]; av_assert2(!is_hwaccel_pix_fmt(avctx->sw_pix_fmt)); choices = av_malloc_array(n + 1, sizeof(*choices)); if (!choices) return AV_PIX_FMT_NONE; memcpy(choices, fmt, (n + 1) * sizeof(*choices)); for (;;) { 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); ret = avctx->get_format(avctx, choices); desc = av_pix_fmt_desc_get(ret); if (!desc) { ret = AV_PIX_FMT_NONE; break; } if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) break; if (avctx->hw_frames_ctx) { AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data; if (hw_frames_ctx->format != ret) { av_log(avctx, AV_LOG_ERROR, "Format returned from get_buffer() " "does not match the format of provided AVHWFramesContext\n"); ret = AV_PIX_FMT_NONE; break; } } if (!setup_hwaccel(avctx, ret, desc->name)) break; /* Remove failed hwaccel from choices */ for (n = 0; choices[n] != ret; n++) av_assert0(choices[n] != AV_PIX_FMT_NONE); do choices[n] = choices[n + 1]; while (choices[n++] != AV_PIX_FMT_NONE); } av_freep(&choices); return ret; } static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame) { FramePool *pool = avctx->internal->pool; int i, ret; switch (avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: { uint8_t *data[4]; int linesize[4]; int size[4] = { 0 }; int w = frame->width; int h = frame->height; int tmpsize, unaligned; if (pool->format == frame->format && pool->width == frame->width && pool->height == frame->height) return 0; avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align); do { // NOTE: do not align linesizes individually, this breaks e.g. assumptions // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2 ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w); if (ret < 0) return ret; // increase alignment of w for next try (rhs gives the lowest bit set in w) w += w & ~(w - 1); unaligned = 0; for (i = 0; i < 4; i++) unaligned |= linesize[i] % pool->stride_align[i]; } while (unaligned); tmpsize = av_image_fill_pointers(data, avctx->pix_fmt, h, NULL, linesize); if (tmpsize < 0) return -1; for (i = 0; i < 3 && data[i + 1]; i++) size[i] = data[i + 1] - data[i]; size[i] = tmpsize - (data[i] - data[0]); for (i = 0; i < 4; i++) { av_buffer_pool_uninit(&pool->pools[i]); pool->linesize[i] = linesize[i]; if (size[i]) { pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1, CONFIG_MEMORY_POISONING ? NULL : av_buffer_allocz); if (!pool->pools[i]) { ret = AVERROR(ENOMEM); goto fail; } } } pool->format = frame->format; pool->width = frame->width; pool->height = frame->height; break; } case AVMEDIA_TYPE_AUDIO: { int ch = frame->channels; //av_get_channel_layout_nb_channels(frame->channel_layout); int planar = av_sample_fmt_is_planar(frame->format); int planes = planar ? ch : 1; if (pool->format == frame->format && pool->planes == planes && pool->channels == ch && frame->nb_samples == pool->samples) return 0; av_buffer_pool_uninit(&pool->pools[0]); ret = av_samples_get_buffer_size(&pool->linesize[0], ch, frame->nb_samples, frame->format, 0); if (ret < 0) goto fail; pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL); if (!pool->pools[0]) { ret = AVERROR(ENOMEM); goto fail; } pool->format = frame->format; pool->planes = planes; pool->channels = ch; pool->samples = frame->nb_samples; break; } default: av_assert0(0); } return 0; fail: for (i = 0; i < 4; i++) av_buffer_pool_uninit(&pool->pools[i]); pool->format = -1; pool->planes = pool->channels = pool->samples = 0; pool->width = pool->height = 0; return ret; } static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame) { FramePool *pool = avctx->internal->pool; int planes = pool->planes; int i; frame->linesize[0] = pool->linesize[0]; if (planes > AV_NUM_DATA_POINTERS) { frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data)); frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS; frame->extended_buf = av_mallocz_array(frame->nb_extended_buf, sizeof(*frame->extended_buf)); if (!frame->extended_data || !frame->extended_buf) { av_freep(&frame->extended_data); av_freep(&frame->extended_buf); return AVERROR(ENOMEM); } } else { frame->extended_data = frame->data; av_assert0(frame->nb_extended_buf == 0); } for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) { frame->buf[i] = av_buffer_pool_get(pool->pools[0]); if (!frame->buf[i]) goto fail; frame->extended_data[i] = frame->data[i] = frame->buf[i]->data; } for (i = 0; i < frame->nb_extended_buf; i++) { frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]); if (!frame->extended_buf[i]) goto fail; frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data; } if (avctx->debug & FF_DEBUG_BUFFERS) av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame); return 0; fail: av_frame_unref(frame); return AVERROR(ENOMEM); } static int video_get_buffer(AVCodecContext *s, AVFrame *pic) { FramePool *pool = s->internal->pool; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format); int i; if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) { av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n"); return -1; } if (!desc) { av_log(s, AV_LOG_ERROR, "Unable to get pixel format descriptor for format %s\n", av_get_pix_fmt_name(pic->format)); return AVERROR(EINVAL); } memset(pic->data, 0, sizeof(pic->data)); pic->extended_data = pic->data; for (i = 0; i < 4 && pool->pools[i]; i++) { pic->linesize[i] = pool->linesize[i]; pic->buf[i] = av_buffer_pool_get(pool->pools[i]); if (!pic->buf[i]) goto fail; pic->data[i] = pic->buf[i]->data; } for (; i < AV_NUM_DATA_POINTERS; i++) { pic->data[i] = NULL; pic->linesize[i] = 0; } if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format); if (s->debug & FF_DEBUG_BUFFERS) av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic); return 0; fail: av_frame_unref(pic); return AVERROR(ENOMEM); } int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags) { int ret; if (avctx->hw_frames_ctx) { ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0); frame->width = avctx->coded_width; frame->height = avctx->coded_height; return ret; } if ((ret = update_frame_pool(avctx, frame)) < 0) return ret; switch (avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: return video_get_buffer(avctx, frame); case AVMEDIA_TYPE_AUDIO: return audio_get_buffer(avctx, frame); default: return -1; } } static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame) { int 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_init_buffer_info(AVCodecContext *avctx, AVFrame *frame) { const AVPacket *pkt = avctx->internal->last_pkt_props; int i; 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 }, }; if (pkt) { frame->pts = pkt->pts; #if FF_API_PKT_PTS FF_DISABLE_DEPRECATION_WARNINGS frame->pkt_pts = pkt->pts; FF_ENABLE_DEPRECATION_WARNINGS #endif frame->pkt_pos = pkt->pos; frame->pkt_duration = pkt->duration; frame->pkt_size = pkt->size; for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) { int 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); } } frame->reordered_opaque = avctx->reordered_opaque; 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->channel_layout) { if (avctx->channel_layout) { if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) { av_log(avctx, AV_LOG_ERROR, "Inconsistent channel " "configuration.\n"); return AVERROR(EINVAL); } frame->channel_layout = avctx->channel_layout; } else { if (avctx->channels > FF_SANE_NB_CHANNELS) { av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n", avctx->channels); return AVERROR(ENOSYS); } } } frame->channels = avctx->channels; break; } return 0; } int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame) { return ff_init_buffer_info(avctx, frame); } 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 now do not enforce anything for palette of pseudopal formats if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) num_planes = 2; // 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; } static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags) { const AVHWAccel *hwaccel = avctx->hwaccel; int override_dimensions = 1; int ret; if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { if ((ret = av_image_check_size2(avctx->width, 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"); return AVERROR(EINVAL); } 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"); return AVERROR(EINVAL); } } ret = ff_decode_frame_props(avctx, frame); if (ret < 0) return ret; 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 end; validate_avframe_allocation(avctx, frame); ret = ff_attach_decode_data(frame); if (ret < 0) goto end; end: if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions && !(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) { frame->width = avctx->width; frame->height = avctx->height; } if (ret < 0) av_frame_unref(frame); return ret; } int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) { int ret = get_buffer_internal(avctx, frame, flags); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); frame->width = frame->height = 0; } return ret; } static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame) { 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); } ff_init_buffer_info(avctx, frame); if (!frame->data[0]) return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); if (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 ret = reget_buffer_internal(avctx, frame); if (ret < 0) av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); return ret; } void avcodec_flush_buffers(AVCodecContext *avctx) { avctx->internal->draining = 0; avctx->internal->draining_done = 0; avctx->internal->nb_draining_errors = 0; av_frame_unref(avctx->internal->buffer_frame); av_frame_unref(avctx->internal->compat_decode_frame); av_packet_unref(avctx->internal->buffer_pkt); avctx->internal->buffer_pkt_valid = 0; av_packet_unref(avctx->internal->ds.in_pkt); if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) ff_thread_flush(avctx); else if (avctx->codec->flush) avctx->codec->flush(avctx); avctx->pts_correction_last_pts = avctx->pts_correction_last_dts = INT64_MIN; ff_decode_bsfs_uninit(avctx); if (!avctx->refcounted_frames) av_frame_unref(avctx->internal->to_free); } void ff_decode_bsfs_uninit(AVCodecContext *avctx) { DecodeFilterContext *s = &avctx->internal->filter; int i; for (i = 0; i < s->nb_bsfs; i++) av_bsf_free(&s->bsfs[i]); av_freep(&s->bsfs); s->nb_bsfs = 0; }