diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/amr.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/amr.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/contrib/ffmpeg/libavformat/amr.c b/contrib/ffmpeg/libavformat/amr.c deleted file mode 100644 index 635a898fa..000000000 --- a/contrib/ffmpeg/libavformat/amr.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * amr file format - * Copyright (c) 2001 ffmpeg project - * - * 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 - */ - -/* -Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.txt?number=3267 - -Only mono files are supported. - -*/ -#include "avformat.h" - -static const char AMR_header [] = "#!AMR\n"; -static const char AMRWB_header [] = "#!AMR-WB\n"; - -#ifdef CONFIG_MUXERS -static int amr_write_header(AVFormatContext *s) -{ - ByteIOContext *pb = &s->pb; - AVCodecContext *enc = s->streams[0]->codec; - - s->priv_data = NULL; - - if (enc->codec_id == CODEC_ID_AMR_NB) - { - put_tag(pb, AMR_header); /* magic number */ - } - else if(enc->codec_id == CODEC_ID_AMR_WB) - { - put_tag(pb, AMRWB_header); /* magic number */ - } - else - { - return -1; - } - put_flush_packet(pb); - return 0; -} - -static int amr_write_packet(AVFormatContext *s, AVPacket *pkt) -{ - put_buffer(&s->pb, pkt->data, pkt->size); - put_flush_packet(&s->pb); - return 0; -} - -static int amr_write_trailer(AVFormatContext *s) -{ - return 0; -} -#endif /* CONFIG_MUXERS */ - -static int amr_probe(AVProbeData *p) -{ - //Only check for "#!AMR" which could be amr-wb, amr-nb. - //This will also trigger multichannel files: "#!AMR_MC1.0\n" and - //"#!AMR-WB_MC1.0\n" (not supported) - - if (p->buf_size < 5) - return 0; - if(memcmp(p->buf,AMR_header,5)==0) - return AVPROBE_SCORE_MAX; - else - return 0; -} - -/* amr input */ -static int amr_read_header(AVFormatContext *s, - AVFormatParameters *ap) -{ - ByteIOContext *pb = &s->pb; - AVStream *st; - uint8_t header[9]; - - get_buffer(pb, header, 6); - - st = av_new_stream(s, 0); - if (!st) - { - return AVERROR_NOMEM; - } - if(memcmp(header,AMR_header,6)!=0) - { - get_buffer(pb, header+6, 3); - if(memcmp(header,AMRWB_header,9)!=0) - { - return -1; - } - - st->codec->codec_tag = MKTAG('s', 'a', 'w', 'b'); - st->codec->codec_id = CODEC_ID_AMR_WB; - st->codec->sample_rate = 16000; - } - else - { - st->codec->codec_tag = MKTAG('s', 'a', 'm', 'r'); - st->codec->codec_id = CODEC_ID_AMR_NB; - st->codec->sample_rate = 8000; - } - st->codec->channels = 1; - st->codec->codec_type = CODEC_TYPE_AUDIO; - av_set_pts_info(st, 64, 1, st->codec->sample_rate); - - return 0; -} - -static int amr_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - AVCodecContext *enc = s->streams[0]->codec; - int read, size, toc, mode; - - if (url_feof(&s->pb)) - { - return AVERROR_IO; - } - -//FIXME this is wrong, this should rather be in a AVParset - toc=get_byte(&s->pb); - mode = (toc >> 3) & 0x0F; - - if (enc->codec_id == CODEC_ID_AMR_NB) - { - static const uint8_t packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0}; - - size=packed_size[mode]+1; - } - else if(enc->codec_id == CODEC_ID_AMR_WB) - { - static uint8_t packed_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1}; - - size=packed_size[mode]; - } - else - { - assert(0); - } - - if ( (size==0) || av_new_packet(pkt, size)) - { - return AVERROR_IO; - } - - pkt->stream_index = 0; - pkt->pos= url_ftell(&s->pb); - pkt->data[0]=toc; - pkt->duration= enc->codec_id == CODEC_ID_AMR_NB ? 160 : 320; - read = get_buffer(&s->pb, pkt->data+1, size-1); - - if (read != size-1) - { - av_free_packet(pkt); - return AVERROR_IO; - } - - return 0; -} - -#ifdef CONFIG_AMR_DEMUXER -AVInputFormat amr_demuxer = { - "amr", - "3gpp amr file format", - 0, /*priv_data_size*/ - amr_probe, - amr_read_header, - amr_read_packet, - NULL, -}; -#endif - -#ifdef CONFIG_AMR_MUXER -AVOutputFormat amr_muxer = { - "amr", - "3gpp amr file format", - "audio/amr", - "amr", - 0, - CODEC_ID_AMR_NB, - CODEC_ID_NONE, - amr_write_header, - amr_write_packet, - amr_write_trailer, -}; -#endif |