diff options
Diffstat (limited to 'ffmpeg/libavformat/bit.c')
| -rw-r--r-- | ffmpeg/libavformat/bit.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/ffmpeg/libavformat/bit.c b/ffmpeg/libavformat/bit.c deleted file mode 100644 index 0be471a..0000000 --- a/ffmpeg/libavformat/bit.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * G.729 bit format muxer and demuxer - * Copyright (c) 2007-2008 Vladimir Voroshilov - * - * 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 "avformat.h" -#include "internal.h" -#include "libavcodec/get_bits.h" -#include "libavcodec/put_bits.h" - -#define MAX_FRAME_SIZE 10 - -#define SYNC_WORD 0x6b21 -#define BIT_0 0x7f -#define BIT_1 0x81 - -static int probe(AVProbeData *p) -{ - int i, j; - - if(p->buf_size < 0x40) - return 0; - - for(i=0; i+3<p->buf_size && i< 10*0x50; ){ - if(AV_RL16(&p->buf[0]) != SYNC_WORD) - return 0; - j=AV_RL16(&p->buf[2]); - if(j!=0x40 && j!=0x50) - return 0; - i+=j; - } - return AVPROBE_SCORE_EXTENSION; -} - -static int read_header(AVFormatContext *s) -{ - AVStream* st; - - st=avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - st->codec->codec_id=AV_CODEC_ID_G729; - st->codec->sample_rate=8000; - st->codec->block_align = 16; - st->codec->channels=1; - - avpriv_set_pts_info(st, 64, 1, 100); - return 0; -} - -static int read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - AVIOContext *pb = s->pb; - PutBitContext pbo; - uint16_t buf[8 * MAX_FRAME_SIZE + 2]; - int packet_size; - uint16_t* src=buf; - int i, j, ret; - int64_t pos= avio_tell(pb); - - if(url_feof(pb)) - return AVERROR_EOF; - - avio_rl16(pb); // sync word - packet_size = avio_rl16(pb) / 8; - if(packet_size > MAX_FRAME_SIZE) - return AVERROR_INVALIDDATA; - - ret = avio_read(pb, (uint8_t*)buf, (8 * packet_size) * sizeof(uint16_t)); - if(ret<0) - return ret; - if(ret != 8 * packet_size * sizeof(uint16_t)) - return AVERROR(EIO); - - if (av_new_packet(pkt, packet_size) < 0) - return AVERROR(ENOMEM); - - init_put_bits(&pbo, pkt->data, packet_size); - for(j=0; j < packet_size; j++) - for(i=0; i<8;i++) - put_bits(&pbo,1, AV_RL16(src++) == BIT_1 ? 1 : 0); - - flush_put_bits(&pbo); - - pkt->duration=1; - pkt->pos = pos; - return 0; -} - -AVInputFormat ff_bit_demuxer = { - .name = "bit", - .long_name = NULL_IF_CONFIG_SMALL("G.729 BIT file format"), - .read_probe = probe, - .read_header = read_header, - .read_packet = read_packet, - .extensions = "bit", -}; - -#if CONFIG_MUXERS -static int write_header(AVFormatContext *s) -{ - AVCodecContext *enc = s->streams[0]->codec; - - enc->codec_id = AV_CODEC_ID_G729; - enc->channels = 1; - enc->bits_per_coded_sample = 16; - enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3; - - return 0; -} - -static int write_packet(AVFormatContext *s, AVPacket *pkt) -{ - AVIOContext *pb = s->pb; - GetBitContext gb; - int i; - - avio_wl16(pb, SYNC_WORD); - avio_wl16(pb, 8 * 10); - - init_get_bits(&gb, pkt->data, 8*10); - for(i=0; i< 8 * 10; i++) - avio_wl16(pb, get_bits1(&gb) ? BIT_1 : BIT_0); - - return 0; -} - -AVOutputFormat ff_bit_muxer = { - .name = "bit", - .long_name = NULL_IF_CONFIG_SMALL("G.729 BIT file format"), - .mime_type = "audio/bit", - .extensions = "bit", - .audio_codec = AV_CODEC_ID_G729, - .video_codec = AV_CODEC_ID_NONE, - .write_header = write_header, - .write_packet = write_packet, -}; -#endif |