mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 11004 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Baptiste Coudurier
17 years ago
parent
02d361919a
commit
8361b1bea8
4 changed files with 0 additions and 294 deletions
@ -1,281 +0,0 @@ |
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/*
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* Ogg bitstream support |
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* Mark Hills <mark@pogo.org.uk> |
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* |
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* Uses libogg, but requires libvorbisenc to construct correct headers |
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* when containing Vorbis stream -- currently the only format supported |
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* |
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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 <stdio.h> |
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#include <ogg/ogg.h> |
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#include "avformat.h" |
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#define DECODER_BUFFER_SIZE 4096 |
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typedef struct OggContext { |
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/* output */ |
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ogg_stream_state os ; |
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int header_handled ; |
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ogg_packet op; |
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/* input */ |
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ogg_sync_state oy ; |
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} OggContext ; |
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#ifdef CONFIG_MUXERS |
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static int ogg_write_header(AVFormatContext *avfcontext) |
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{ |
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OggContext *context = avfcontext->priv_data; |
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ogg_packet *op= &context->op; |
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int n; |
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ogg_stream_init(&context->os, 31415); |
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for(n = 0 ; n < avfcontext->nb_streams ; n++) { |
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AVCodecContext *codec = avfcontext->streams[n]->codec; |
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uint8_t *headers = codec->extradata; |
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int headers_len = codec->extradata_size; |
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uint8_t *header_start[3]; |
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int header_len[3]; |
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int i, j; |
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av_set_pts_info(avfcontext->streams[n], 60, 1, AV_TIME_BASE); |
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for(j=1,i=0;i<2;++i, ++j) { |
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header_len[i]=0; |
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while(j<headers_len && headers[j]==0xff) { |
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header_len[i]+=0xff; |
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++j; |
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} |
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header_len[i]+=headers[j]; |
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} |
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header_len[2]=headers_len-header_len[0]-header_len[1]-j; |
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headers+=j; |
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header_start[0] = headers; |
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header_start[1] = header_start[0] + header_len[0]; |
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header_start[2] = header_start[1] + header_len[1]; |
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for(i=0; i < 3; ++i){ |
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op->bytes = header_len[i]; |
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op->packet= header_start[i]; |
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op->b_o_s= op->packetno==0; |
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ogg_stream_packetin(&context->os, op); |
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op->packetno++; //FIXME multiple streams
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} |
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context->header_handled = 0 ; |
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} |
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return 0 ; |
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} |
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static int ogg_write_packet(AVFormatContext *avfcontext, AVPacket *pkt) |
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{ |
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OggContext *context = avfcontext->priv_data ; |
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AVCodecContext *avctx= avfcontext->streams[pkt->stream_index]->codec; |
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ogg_packet *op= &context->op; |
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ogg_page og ; |
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int64_t pts; |
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pts= av_rescale(pkt->pts, avctx->sample_rate, AV_TIME_BASE); |
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// av_log(avfcontext, AV_LOG_DEBUG, "M%d\n", size);
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/* flush header packets so audio starts on a new page */ |
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if(!context->header_handled) { |
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while(ogg_stream_flush(&context->os, &og)) { |
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put_buffer(&avfcontext->pb, og.header, og.header_len) ; |
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put_buffer(&avfcontext->pb, og.body, og.body_len) ; |
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put_flush_packet(&avfcontext->pb); |
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} |
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context->header_handled = 1 ; |
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} |
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op->packet = (uint8_t*) pkt->data; |
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op->bytes = pkt->size; |
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op->b_o_s = op->packetno == 0; |
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op->granulepos= pts; |
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/* correct the fields in the packet -- essential for streaming */ |
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ogg_stream_packetin(&context->os, op); |
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while(ogg_stream_pageout(&context->os, &og)) { |
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put_buffer(&avfcontext->pb, og.header, og.header_len); |
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put_buffer(&avfcontext->pb, og.body, og.body_len); |
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put_flush_packet(&avfcontext->pb); |
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} |
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op->packetno++; |
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return 0; |
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} |
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static int ogg_write_trailer(AVFormatContext *avfcontext) { |
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OggContext *context = avfcontext->priv_data ; |
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ogg_page og ; |
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while(ogg_stream_flush(&context->os, &og)) { |
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put_buffer(&avfcontext->pb, og.header, og.header_len) ; |
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put_buffer(&avfcontext->pb, og.body, og.body_len) ; |
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put_flush_packet(&avfcontext->pb); |
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} |
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ogg_stream_clear(&context->os) ; |
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return 0 ; |
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} |
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AVOutputFormat libogg_muxer = { |
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"libogg", |
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"Ogg format", |
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"application/ogg", |
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"ogg", |
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sizeof(OggContext), |
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CODEC_ID_VORBIS, |
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0, |
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ogg_write_header, |
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ogg_write_packet, |
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ogg_write_trailer, |
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} ; |
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#endif //CONFIG_MUXERS
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#if 0 |
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static int next_packet(AVFormatContext *avfcontext, ogg_packet *op) { |
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OggContext *context = avfcontext->priv_data ; |
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ogg_page og ; |
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char *buf ; |
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while(ogg_stream_packetout(&context->os, op) != 1) { |
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/* while no pages are available, read in more data to the sync */ |
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while(ogg_sync_pageout(&context->oy, &og) != 1) { |
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buf = ogg_sync_buffer(&context->oy, DECODER_BUFFER_SIZE) ; |
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if(get_buffer(&avfcontext->pb, buf, DECODER_BUFFER_SIZE) <= 0) |
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return 1 ; |
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ogg_sync_wrote(&context->oy, DECODER_BUFFER_SIZE) ; |
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} |
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/* got a page. Feed it into the stream and get the packet */ |
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if(ogg_stream_pagein(&context->os, &og) != 0) |
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return 1 ; |
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} |
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return 0 ; |
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} |
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static int ogg_read_header(AVFormatContext *avfcontext, AVFormatParameters *ap) |
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{ |
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OggContext *context = avfcontext->priv_data; |
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ogg_packet op ; |
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char *buf ; |
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ogg_page og ; |
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AVStream *ast ; |
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AVCodecContext *codec; |
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uint8_t *p; |
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int i; |
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ogg_sync_init(&context->oy) ; |
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buf = ogg_sync_buffer(&context->oy, DECODER_BUFFER_SIZE) ; |
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if(get_buffer(&avfcontext->pb, buf, DECODER_BUFFER_SIZE) <= 0) |
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return AVERROR(EIO) ; |
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ogg_sync_wrote(&context->oy, DECODER_BUFFER_SIZE) ; |
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ogg_sync_pageout(&context->oy, &og) ; |
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ogg_stream_init(&context->os, ogg_page_serialno(&og)) ; |
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ogg_stream_pagein(&context->os, &og) ; |
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/* currently only one vorbis stream supported */ |
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ast = av_new_stream(avfcontext, 0) ; |
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if(!ast) |
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return AVERROR(ENOMEM) ; |
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av_set_pts_info(ast, 60, 1, AV_TIME_BASE); |
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codec= &ast->codec; |
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codec->codec_type = CODEC_TYPE_AUDIO; |
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codec->codec_id = CODEC_ID_VORBIS; |
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for(i=0; i<3; i++){ |
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if(next_packet(avfcontext, &op)){ |
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return -1; |
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} |
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if(op.bytes >= (1<<16) || op.bytes < 0) |
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return -1; |
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codec->extradata_size+= 2 + op.bytes; |
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codec->extradata= av_realloc(codec->extradata, codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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memset(codec->extradata + codec->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
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p= codec->extradata + codec->extradata_size - 2 - op.bytes; |
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*(p++)= op.bytes>>8; |
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*(p++)= op.bytes&0xFF; |
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memcpy(p, op.packet, op.bytes); |
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} |
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return 0 ; |
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} |
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static int ogg_read_packet(AVFormatContext *avfcontext, AVPacket *pkt) { |
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ogg_packet op ; |
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if(next_packet(avfcontext, &op)) |
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return AVERROR(EIO) ; |
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if(av_new_packet(pkt, op.bytes) < 0) |
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return AVERROR(EIO) ; |
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pkt->stream_index = 0 ; |
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memcpy(pkt->data, op.packet, op.bytes); |
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if(avfcontext->streams[0]->codec.sample_rate && op.granulepos!=-1) |
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pkt->pts= av_rescale(op.granulepos, AV_TIME_BASE, avfcontext->streams[0]->codec.sample_rate); |
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// printf("%"PRId64" %d %d\n", pkt->pts, (int)op.granulepos, avfcontext->streams[0]->codec.sample_rate);
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return op.bytes; |
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} |
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static int ogg_read_close(AVFormatContext *avfcontext) { |
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OggContext *context = avfcontext->priv_data ; |
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ogg_stream_clear(&context->os) ; |
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ogg_sync_clear(&context->oy) ; |
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return 0 ; |
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} |
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static AVInputFormat ogg_iformat = { |
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"ogg", |
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"Ogg Vorbis", |
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sizeof(OggContext), |
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NULL, |
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ogg_read_header, |
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ogg_read_packet, |
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ogg_read_close, |
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.extensions = "ogg", |
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} ; |
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#endif |
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