Oma demuxer
Originally committed as revision 13712 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benjamin Larsson
parent
b146e17df5
commit
b339f0c6be
@ -298,6 +298,7 @@ enum CodecID {
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CODEC_ID_WMAVOICE,
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CODEC_ID_WMAPRO,
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CODEC_ID_WMALOSSLESS,
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CODEC_ID_ATRAC3P,
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/* subtitle codecs */
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CODEC_ID_DVD_SUBTITLE= 0x17000,
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@ -117,6 +117,7 @@ OBJS-$(CONFIG_OGG_DEMUXER) += oggdec.o \
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oggparsevorbis.o \
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riff.o
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OBJS-$(CONFIG_OGG_MUXER) += oggenc.o
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OBJS-$(CONFIG_OMA_DEMUXER) += oma.o
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OBJS-$(CONFIG_PCM_ALAW_DEMUXER) += raw.o
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OBJS-$(CONFIG_PCM_ALAW_MUXER) += raw.o
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OBJS-$(CONFIG_PCM_MULAW_DEMUXER) += raw.o
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@ -129,6 +129,7 @@ void av_register_all(void)
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REGISTER_MUXDEMUX (NUT, nut);
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REGISTER_DEMUXER (NUV, nuv);
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REGISTER_MUXDEMUX (OGG, ogg);
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REGISTER_DEMUXER (OMA, oma);
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REGISTER_MUXDEMUX (PCM_ALAW, pcm_alaw);
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REGISTER_MUXDEMUX (PCM_MULAW, pcm_mulaw);
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REGISTER_MUXDEMUX (PCM_S16BE, pcm_s16be);
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190
libavformat/oma.c
Normal file
190
libavformat/oma.c
Normal file
@ -0,0 +1,190 @@
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/*
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* Sony OpenMG (OMA) demuxer
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*
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* Copyright (c) 2008 Maxim Poliakovski
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* 2008 Benjamin Larsson
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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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/**
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* @file oma.c
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* This is a demuxer for Sony OpenMG Music files
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*
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* Known file extensions: ".oma", "aa3"
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* The format of such files consists of three parts:
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* - "ea3" header carrying overall info and metadata.
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* - "EA3" header is a Sony-specific header containing information about
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* the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA),
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* codec specific info (packet size, sample rate, channels and so on)
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* and DRM related info (file encryption, content id).
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* - Sound data organized in packets follow the EA3 header
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* (can be encrypted using the Sony DRM!).
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*
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* LIMITATIONS: This version supports only plain (unencrypted) OMA files.
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* If any DRM-protected (encrypted) file is encountered you will get the
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* corresponding error message. Try to remove the encryption using any
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* Sony software (for example SonicStage).
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* CODEC SUPPORT: Only ATRAC3 codec is currently supported!
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*/
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#include "avformat.h"
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#include "libavutil/intreadwrite.h"
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#include "raw.h"
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#include "riff.h"
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#define EA3_HEADER_SIZE 96
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enum {
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OMA_CODECID_ATRAC3 = 0,
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OMA_CODECID_ATRAC3P = 1,
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};
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static const AVCodecTag codec_oma_tags[] = {
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{ CODEC_ID_ATRAC3, OMA_CODECID_ATRAC3 },
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{ CODEC_ID_ATRAC3P, OMA_CODECID_ATRAC3P },
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};
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static int oma_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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static const uint16_t srate_tab[6] = {320,441,480,882,960,0};
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int ret, ea3_taglen, EA3_pos, framesize, jsflag, samplerate, channel_id;
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uint32_t codec_params;
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int16_t eid;
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uint8_t buf[EA3_HEADER_SIZE];
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uint8_t *edata;
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AVStream *st;
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ret = get_buffer(s->pb, buf, 10);
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if (ret != 10)
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return -1;
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ea3_taglen = ((buf[6] & 0x7f) << 21) | ((buf[7] & 0x7f) << 14) | ((buf[8] & 0x7f) << 7) | (buf[9] & 0x7f);
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EA3_pos = ea3_taglen + 10;
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if (buf[5] & 0x10)
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EA3_pos += 10;
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url_fseek(s->pb, EA3_pos, SEEK_SET);
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ret = get_buffer(s->pb, buf, EA3_HEADER_SIZE);
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if (ret != EA3_HEADER_SIZE)
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return -1;
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if (memcmp(buf, (uint8_t[]){'E', 'A', '3'},3) || buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
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av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
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return -1;
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}
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eid = AV_RB16(&buf[6]);
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if (eid != -1 && eid != -128) {
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av_log(s, AV_LOG_ERROR, "Encrypted file! Eid: %d\n", eid);
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return -1;
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}
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codec_params = AV_RB24(&buf[33]);
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channel_id = (codec_params >> 10) & 7;
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samplerate = srate_tab[(codec_params >> 13) & 7]*100;
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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switch (buf[32]) {
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case OMA_CODECID_ATRAC3:
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if (samplerate != 44100)
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av_log(s, AV_LOG_ERROR, "Unsupported sample rate, send sample file to developers: %d\n", samplerate);
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framesize = (codec_params & 0x3FF) * 8;
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jsflag = (codec_params >> 17) & 1; /* get stereo coding mode, 1 for joint-stereo */
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channel_id = 2;
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/* fake the atrac3 extradata (wav format, makes stream copy to wav work) */
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st->codec->extradata_size = 14;
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edata = av_mallocz(14 + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!edata)
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return AVERROR(ENOMEM);
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st->codec->extradata = edata;
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AV_WL16(&edata[0], 1); // always 1
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AV_WL32(&edata[2], samplerate); // samples rate
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AV_WL16(&edata[6], jsflag); // coding mode
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AV_WL16(&edata[8], jsflag); // coding mode
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AV_WL16(&edata[10], 1); // always 1
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// AV_WL16(&edata[12], 0); // always 0
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break;
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case OMA_CODECID_ATRAC3P:
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framesize = ((codec_params & 0x3FF) * 8) + 8;
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av_log(s, AV_LOG_ERROR, "Unsupported codec ATRAC3+!\n");
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break;
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default:
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av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n",buf[32]);
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return -1;
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break;
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}
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st->codec->codec_type = CODEC_TYPE_AUDIO;
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st->codec->codec_tag = buf[32];
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st->codec->codec_id = codec_get_id(codec_oma_tags, st->codec->codec_tag);
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st->codec->channels = channel_id;
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st->codec->sample_rate = samplerate;
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st->codec->bit_rate = samplerate * framesize * 8 / 1024;
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st->codec->block_align = framesize;
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st->start_time = 0;
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av_set_pts_info(st, 64, 1, st->codec->sample_rate);
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url_fseek(s->pb, EA3_pos + EA3_HEADER_SIZE, SEEK_SET);
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return 0;
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}
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static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret = av_get_packet(s->pb, pkt, s->streams[0]->codec->block_align);
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pkt->stream_index = 0;
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if (ret <= 0)
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return AVERROR(EIO);
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return ret;
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}
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static int oma_read_probe(AVProbeData *p)
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{
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if (!memcmp(p->buf, (uint8_t[]){'e', 'a', '3', 3, 0},5))
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return AVPROBE_SCORE_MAX;
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else
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return 0;
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}
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AVInputFormat oma_demuxer = {
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"oma",
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NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
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0,
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oma_read_probe,
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oma_read_header,
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oma_read_packet,
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0,
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pcm_read_seek,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "oma,aa3",
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.codec_tag= (const AVCodecTag*[]){codec_oma_tags, 0},
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};
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