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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /media/ffvpx/libavcodec/vp8_parser.c | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/vp8_parser.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/vp8_parser.c b/media/ffvpx/libavcodec/vp8_parser.c new file mode 100644 index 0000000000..98b752bfb9 --- /dev/null +++ b/media/ffvpx/libavcodec/vp8_parser.c @@ -0,0 +1,79 @@ +/* + * 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 "libavutil/intreadwrite.h" + +#include "avcodec.h" + +static int parse(AVCodecParserContext *s, + AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + unsigned int frame_type; + unsigned int profile; + + *poutbuf = buf; + *poutbuf_size = buf_size; + + if (buf_size < 3) + return buf_size; + + frame_type = buf[0] & 1; + profile = (buf[0] >> 1) & 7; + if (profile > 3) { + av_log(avctx, AV_LOG_ERROR, "Invalid profile %u.\n", profile); + return buf_size; + } + + avctx->profile = profile; + s->key_frame = frame_type == 0; + s->pict_type = frame_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I; + s->format = AV_PIX_FMT_YUV420P; + s->field_order = AV_FIELD_PROGRESSIVE; + s->picture_structure = AV_PICTURE_STRUCTURE_FRAME; + + if (frame_type == 0) { + unsigned int sync_code; + unsigned int width, height; + + if (buf_size < 10) + return buf_size; + + sync_code = AV_RL24(buf + 3); + if (sync_code != 0x2a019d) { + av_log(avctx, AV_LOG_ERROR, "Invalid sync code %06x.\n", sync_code); + return buf_size; + } + + width = AV_RL16(buf + 6) & 0x3fff; + height = AV_RL16(buf + 8) & 0x3fff; + + s->width = width; + s->height = height; + s->coded_width = FFALIGN(width, 16); + s->coded_height = FFALIGN(height, 16); + } + + return buf_size; +} + +const AVCodecParser ff_vp8_parser = { + .codec_ids = { AV_CODEC_ID_VP8 }, + .parser_parse = parse, +}; |