mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 5873 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Måns Rullgård
19 years ago
parent
98a2582f49
commit
6c9ce82f74
5 changed files with 1 additions and 158 deletions
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/**
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Copyright (C) 2005 Måns Rullgård |
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Permission is hereby granted, free of charge, to any person |
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obtaining a copy of this software and associated documentation |
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files (the "Software"), to deal in the Software without |
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restriction, including without limitation the rights to use, copy, |
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modify, merge, publish, distribute, sublicense, and/or sell copies |
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of the Software, and to permit persons to whom the Software is |
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furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be |
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included in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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**/ |
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#include <stdlib.h> |
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#include <theora/theora.h> |
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#include "avcodec.h" |
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typedef struct TheoraContext { |
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theora_info info; |
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theora_state state; |
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theora_comment comment; |
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ogg_packet op; |
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} TheoraContext; |
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static int |
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Theora_decode_frame(AVCodecContext *ctx, void *outdata, int *outdata_size, |
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uint8_t *buf, int buf_size) |
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{ |
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TheoraContext *thc = ctx->priv_data; |
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AVFrame *frame = outdata; |
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yuv_buffer yuv; |
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thc->op.packet = buf; |
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thc->op.bytes = buf_size; |
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if(theora_decode_packetin(&thc->state, &thc->op)) |
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return -1; |
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theora_decode_YUVout(&thc->state, &yuv); |
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frame->data[0] = yuv.y; |
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frame->data[1] = yuv.u; |
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frame->data[2] = yuv.v; |
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frame->linesize[0] = yuv.y_stride; |
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frame->linesize[1] = yuv.uv_stride; |
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frame->linesize[2] = yuv.uv_stride; |
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*outdata_size = sizeof(*frame); |
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return buf_size; |
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} |
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static int |
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Theora_decode_end(AVCodecContext *ctx) |
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{ |
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TheoraContext *thc = ctx->priv_data; |
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theora_info_clear(&thc->info); |
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theora_comment_clear(&thc->comment); |
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return 0; |
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} |
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static int |
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Theora_decode_init(AVCodecContext *ctx) |
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{ |
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TheoraContext *thc = ctx->priv_data; |
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int size, hs, i; |
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ogg_packet op; |
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uint8_t *cdp; |
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if(ctx->extradata_size < 6) |
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return -1; |
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theora_info_init(&thc->info); |
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memset(&op, 0, sizeof(op)); |
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cdp = ctx->extradata; |
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size = ctx->extradata_size; |
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for(i = 0; i < 3; i++){ |
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hs = *cdp++ << 8; |
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hs += *cdp++; |
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size -= 2; |
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if(hs > size){ |
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av_log(ctx, AV_LOG_ERROR, "extradata too small: %i > %i\n", |
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hs, size); |
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return -1; |
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} |
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op.packet = cdp; |
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op.bytes = hs; |
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op.b_o_s = !i; |
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if(theora_decode_header(&thc->info, &thc->comment, &op)) |
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return -1; |
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op.packetno++; |
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cdp += hs; |
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size -= hs; |
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} |
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theora_decode_init(&thc->state, &thc->info); |
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ctx->width = thc->info.width; |
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ctx->height = thc->info.height; |
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ctx->time_base.num = thc->info.fps_denominator; |
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ctx->time_base.den = thc->info.fps_numerator; |
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ctx->pix_fmt = PIX_FMT_YUV420P; /* FIXME: others are possible */ |
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return 0; |
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} |
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AVCodec oggtheora_decoder = { |
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"theora", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_THEORA, |
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sizeof(TheoraContext), |
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Theora_decode_init, |
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NULL, |
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Theora_decode_end, |
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Theora_decode_frame, |
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0, |
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NULL |
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}; |
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