9519983c0f
This fixes decoding of H264 video samples with SPS and PPS changes. See for example https://s3.amazonaws.com/tmm1/videotoolbox/spschange.ts, which previously stalled the decoder and failed to produce any new frames after the SPS change. Also see https://s3.amazonaws.com/tmm1/videotoolbox/ppschange.ts, which uses multiple PPS and would previously cause VT decode failures. If the VideoToolbox session needs to be restarted, and videotoolbox_start() fails for some reason (for instance, if the video is interlaced and the decoder is running on iOS), avcodec will return AVERROR_EXTERNAL. This can be used by the API user to switch to another decoder. Signed-off-by: Aman Gupta <aman@tmm1.net>
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_VT_INTERNAL_H
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#define AVCODEC_VT_INTERNAL_H
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typedef struct VTContext {
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// The current bitstream buffer.
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uint8_t *bitstream;
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// The current size of the bitstream.
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int bitstream_size;
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// The reference size used for fast reallocation.
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int allocated_size;
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// The core video buffer
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CVImageBufferRef frame;
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// Current dummy frames context (depends on exact CVImageBufferRef params).
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struct AVBufferRef *cached_hw_frames_ctx;
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// Non-NULL if the new hwaccel API is used. This is only a separate struct
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// to ease compatibility with the old API.
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struct AVVideotoolboxContext *vt_ctx;
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// Current H264 parameters (used to trigger decoder restart on SPS changes).
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uint8_t *sps;
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uint32_t sps_len;
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unsigned int sps_capa;
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bool reconfig_needed;
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} VTContext;
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int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame);
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int ff_videotoolbox_uninit(AVCodecContext *avctx);
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int ff_videotoolbox_buffer_create(VTContext *vtctx, AVFrame *frame);
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int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx,
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const uint8_t *buffer,
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uint32_t size);
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int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx,
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const uint8_t *buffer,
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uint32_t size);
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CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx);
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CFDataRef ff_videotoolbox_hvcc_extradata_create(AVCodecContext *avctx);
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#endif /* AVCODEC_VT_INTERNAL_H */
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