X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Famr.c;h=ba91d7c139ac0cf2c962382a0b9ccc92cac1c3ed;hb=8cc2fa1e5db0655c053b35c948ef05ba0fe13707;hp=9992f09959b950334bbcef485e455b904e34c4ef;hpb=d84fd5d153f7d12504cf605c786e3cfd2397206d;p=ffmpeg diff --git a/libavformat/amr.c b/libavformat/amr.c index 9992f09959b..ba91d7c139a 100644 --- a/libavformat/amr.c +++ b/libavformat/amr.c @@ -2,20 +2,20 @@ * amr file format * Copyright (c) 2001 ffmpeg project * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -25,189 +25,157 @@ Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.tx Only mono files are supported. */ + +#include "libavutil/channel_layout.h" #include "avformat.h" +#include "internal.h" -static const char AMR_header [] = "#!AMR\n"; -static const char AMRWB_header [] = "#!AMR-WB\n"; +static const char AMR_header[] = "#!AMR\n"; +static const char AMRWB_header[] = "#!AMR-WB\n"; -#ifdef CONFIG_MUXERS +#if CONFIG_AMR_MUXER static int amr_write_header(AVFormatContext *s) { - ByteIOContext *pb = &s->pb; + AVIOContext *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 - { + if (enc->codec_id == AV_CODEC_ID_AMR_NB) { + avio_write(pb, AMR_header, sizeof(AMR_header) - 1); /* magic number */ + } else if (enc->codec_id == AV_CODEC_ID_AMR_WB) { + avio_write(pb, AMRWB_header, sizeof(AMRWB_header) - 1); /* magic number */ + } else { return -1; } - put_flush_packet(pb); + avio_flush(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) -{ + avio_write(s->pb, pkt->data, pkt->size); + avio_flush(s->pb); return 0; } -#endif /* CONFIG_MUXERS */ +#endif /* CONFIG_AMR_MUXER */ 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) + // 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) + if (!memcmp(p->buf, AMR_header, 5)) return AVPROBE_SCORE_MAX; else return 0; } /* amr input */ -static int amr_read_header(AVFormatContext *s, - AVFormatParameters *ap) +static int amr_read_header(AVFormatContext *s) { - ByteIOContext *pb = &s->pb; + AVIOContext *pb = s->pb; AVStream *st; uint8_t header[9]; - get_buffer(pb, header, 6); + avio_read(pb, header, 6); - if(memcmp(header,AMR_header,6)!=0) - { - get_buffer(pb, header+6, 3); - if(memcmp(header,AMRWB_header,9)!=0) - { + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + if (memcmp(header, AMR_header, 6)) { + avio_read(pb, header + 6, 3); + if (memcmp(header, AMRWB_header, 9)) { return -1; } - st = av_new_stream(s, 0); - if (!st) - { - return AVERROR_NOMEM; - } - st->codec->codec_tag = MKTAG('s', 'a', 'w', 'b'); - st->codec->codec_id = CODEC_ID_AMR_WB; + st->codec->codec_tag = MKTAG('s', 'a', 'w', 'b'); + st->codec->codec_id = AV_CODEC_ID_AMR_WB; st->codec->sample_rate = 16000; - } - else - { - st = av_new_stream(s, 0); - if (!st) - { - return AVERROR_NOMEM; - } - - st->codec->codec_tag = MKTAG('s', 'a', 'm', 'r'); - st->codec->codec_id = CODEC_ID_AMR_NB; + } else { + st->codec->codec_tag = MKTAG('s', 'a', 'm', 'r'); + st->codec->codec_id = AV_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); + st->codec->channels = 1; + st->codec->channel_layout = AV_CH_LAYOUT_MONO; + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); return 0; } -#define MAX_SIZE 32 - -static int amr_read_packet(AVFormatContext *s, - AVPacket *pkt) +static int amr_read_packet(AVFormatContext *s, AVPacket *pkt) { AVCodecContext *enc = s->streams[0]->codec; - int read, size, toc, mode; + int read, size = 0, toc, mode; + int64_t pos = avio_tell(s->pb); - if (url_feof(&s->pb)) - { - return AVERROR_IO; + if (s->pb->eof_reached) { + return AVERROR(EIO); } - toc=get_byte(&s->pb); + // FIXME this is wrong, this should rather be in a AVParset + toc = avio_r8(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}; + if (enc->codec_id == AV_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] + 1; + } else if (enc->codec_id == AV_CODEC_ID_AMR_WB) { + static const 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 - { + size = packed_size[mode]; + } else { assert(0); } - if ( (size==0) || av_new_packet(pkt, size)) - { - return AVERROR_IO; - } + if (!size || av_new_packet(pkt, size)) + return AVERROR(EIO); + + /* Both AMR formats have 50 frames per second */ + s->streams[0]->codec->bit_rate = size*8*50; 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); + pkt->pos = pos; + pkt->data[0] = toc; + pkt->duration = enc->codec_id == AV_CODEC_ID_AMR_NB ? 160 : 320; + read = avio_read(s->pb, pkt->data + 1, size - 1); - if (read != size-1) - { + if (read != size - 1) { av_free_packet(pkt); - return AVERROR_IO; + return AVERROR(EIO); } return 0; } -static int amr_read_close(AVFormatContext *s) -{ - 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, - amr_read_close, +#if CONFIG_AMR_DEMUXER +AVInputFormat ff_amr_demuxer = { + .name = "amr", + .long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"), + .read_probe = amr_probe, + .read_header = amr_read_header, + .read_packet = amr_read_packet, + .flags = AVFMT_GENERIC_INDEX, }; #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, +#if CONFIG_AMR_MUXER +AVOutputFormat ff_amr_muxer = { + .name = "amr", + .long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"), + .mime_type = "audio/amr", + .extensions = "amr", + .audio_codec = AV_CODEC_ID_AMR_NB, + .video_codec = AV_CODEC_ID_NONE, + .write_header = amr_write_header, + .write_packet = amr_write_packet, }; #endif