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https://github.com/FFmpeg/FFmpeg.git
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f56a5fee37
* commit '182cf170a544bce069c8690c90b49381150a1f10': vp8: Return stream format information from parser Return codes are adjusted to consume the whole packet in case of error as the API does not allow returning AVERROR codes (a negative return value is valid). Merged-by: Clément Bœsch <u@pkh.me>
79 lines
2.3 KiB
C
79 lines
2.3 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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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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static int parse(AVCodecParserContext *s,
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AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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unsigned int frame_type;
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unsigned int profile;
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if (buf_size < 3)
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return buf_size;
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frame_type = buf[0] & 1;
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profile = (buf[0] >> 1) & 7;
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if (profile > 3) {
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av_log(avctx, AV_LOG_ERROR, "Invalid profile %u.\n", profile);
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return buf_size;
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}
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avctx->profile = profile;
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s->key_frame = frame_type == 0;
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s->pict_type = frame_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
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s->format = AV_PIX_FMT_YUV420P;
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s->field_order = AV_FIELD_PROGRESSIVE;
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s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
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if (frame_type == 0) {
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unsigned int sync_code;
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unsigned int width, height;
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if (buf_size < 10)
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return buf_size;
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sync_code = AV_RL24(buf + 3);
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if (sync_code != 0x2a019d) {
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av_log(avctx, AV_LOG_ERROR, "Invalid sync code %06x.\n", sync_code);
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return buf_size;
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}
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width = AV_RL16(buf + 6) & 0x3fff;
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height = AV_RL16(buf + 8) & 0x3fff;
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s->width = width;
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s->height = height;
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s->coded_width = FFALIGN(width, 16);
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s->coded_height = FFALIGN(height, 16);
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}
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return buf_size;
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}
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AVCodecParser ff_vp8_parser = {
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.codec_ids = { AV_CODEC_ID_VP8 },
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.parser_parse = parse,
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};
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