/*
- * Sony OpenMG (OMA) demuxer
+ * Sony OpenMG (OMA) common data
*
- * Copyright (c) 2008 Maxim Poliakovski
- * 2008 Benjamin Larsson
+ * This file is part of Libav.
*
- * This file is part of FFmpeg.
- *
- * 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
*/
-/**
- * @file
- * This is a demuxer for Sony OpenMG Music files
- *
- * Known file extensions: ".oma", "aa3"
- * The format of such files consists of three parts:
- * - "ea3" header carrying overall info and metadata. Except for starting with
- * "ea" instead of "ID", it's an ID3v2 header.
- * - "EA3" header is a Sony-specific header containing information about
- * the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA),
- * codec specific info (packet size, sample rate, channels and so on)
- * and DRM related info (file encryption, content id).
- * - Sound data organized in packets follow the EA3 header
- * (can be encrypted using the Sony DRM!).
- *
- * LIMITATIONS: This version supports only plain (unencrypted) OMA files.
- * If any DRM-protected (encrypted) file is encountered you will get the
- * corresponding error message. Try to remove the encryption using any
- * Sony software (for example SonicStage).
- * CODEC SUPPORT: Only ATRAC3 codec is currently supported!
- */
-
-#include "avformat.h"
-#include "libavutil/intreadwrite.h"
-#include "pcm.h"
-#include "riff.h"
-#include "id3v2.h"
+#include "internal.h"
+#include "oma.h"
+#include "libavcodec/avcodec.h"
-#define EA3_HEADER_SIZE 96
+const uint16_t ff_oma_srate_tab[6] = { 320, 441, 480, 882, 960, 0 };
-enum {
- OMA_CODECID_ATRAC3 = 0,
- OMA_CODECID_ATRAC3P = 1,
- OMA_CODECID_MP3 = 3,
- OMA_CODECID_LPCM = 4,
- OMA_CODECID_WMA = 5,
+const AVCodecTag ff_oma_codec_tags[] = {
+ { AV_CODEC_ID_ATRAC3, OMA_CODECID_ATRAC3 },
+ { AV_CODEC_ID_ATRAC3P, OMA_CODECID_ATRAC3P },
+ { AV_CODEC_ID_MP3, OMA_CODECID_MP3 },
+ { AV_CODEC_ID_PCM_S16BE, OMA_CODECID_LPCM },
+ { 0 },
};
-
-static const AVCodecTag codec_oma_tags[] = {
- { CODEC_ID_ATRAC3, OMA_CODECID_ATRAC3 },
- { CODEC_ID_ATRAC3P, OMA_CODECID_ATRAC3P },
- { CODEC_ID_MP3, OMA_CODECID_MP3 },
-};
-
-#define ID3v2_EA3_MAGIC "ea3"
-
-static int oma_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- static const uint16_t srate_tab[6] = {320,441,480,882,960,0};
- int ret, framesize, jsflag, samplerate;
- uint32_t codec_params;
- int16_t eid;
- uint8_t buf[EA3_HEADER_SIZE];
- uint8_t *edata;
- AVStream *st;
-
- ff_id3v2_read(s, ID3v2_EA3_MAGIC);
- ret = get_buffer(s->pb, buf, EA3_HEADER_SIZE);
-
- if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}),3) || buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
- av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
- return -1;
- }
-
- eid = AV_RB16(&buf[6]);
- if (eid != -1 && eid != -128) {
- av_log(s, AV_LOG_ERROR, "Encrypted file! Eid: %d\n", eid);
- return -1;
- }
-
- codec_params = AV_RB24(&buf[33]);
-
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->start_time = 0;
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_tag = buf[32];
- st->codec->codec_id = ff_codec_get_id(codec_oma_tags, st->codec->codec_tag);
-
- switch (buf[32]) {
- case OMA_CODECID_ATRAC3:
- samplerate = srate_tab[(codec_params >> 13) & 7]*100;
- if (samplerate != 44100)
- av_log(s, AV_LOG_ERROR, "Unsupported sample rate, send sample file to developers: %d\n", samplerate);
-
- framesize = (codec_params & 0x3FF) * 8;
- jsflag = (codec_params >> 17) & 1; /* get stereo coding mode, 1 for joint-stereo */
- st->codec->channels = 2;
- st->codec->sample_rate = samplerate;
- st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024;
-
- /* fake the atrac3 extradata (wav format, makes stream copy to wav work) */
- st->codec->extradata_size = 14;
- edata = av_mallocz(14 + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!edata)
- return AVERROR(ENOMEM);
-
- st->codec->extradata = edata;
- AV_WL16(&edata[0], 1); // always 1
- AV_WL32(&edata[2], samplerate); // samples rate
- AV_WL16(&edata[6], jsflag); // coding mode
- AV_WL16(&edata[8], jsflag); // coding mode
- AV_WL16(&edata[10], 1); // always 1
- // AV_WL16(&edata[12], 0); // always 0
-
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
- break;
- case OMA_CODECID_ATRAC3P:
- st->codec->channels = (codec_params >> 10) & 7;
- framesize = ((codec_params & 0x3FF) * 8) + 8;
- st->codec->sample_rate = srate_tab[(codec_params >> 13) & 7]*100;
- st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024;
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
- av_log(s, AV_LOG_ERROR, "Unsupported codec ATRAC3+!\n");
- break;
- case OMA_CODECID_MP3:
- st->need_parsing = AVSTREAM_PARSE_FULL;
- framesize = 1024;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n",buf[32]);
- return -1;
- break;
- }
-
- st->codec->block_align = framesize;
-
- return 0;
-}
-
-
-static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- int ret = av_get_packet(s->pb, pkt, s->streams[0]->codec->block_align);
-
- pkt->stream_index = 0;
- if (ret <= 0)
- return AVERROR(EIO);
-
- return ret;
-}
-
-static int oma_read_probe(AVProbeData *p)
-{
- const uint8_t *buf;
- unsigned tag_len = 0;
-
- buf = p->buf;
- /* version must be 3 and flags byte zero */
- if (ff_id3v2_match(buf, ID3v2_EA3_MAGIC) && buf[3] == 3 && !buf[4])
- tag_len = ff_id3v2_tag_len(buf);
-
- // This check cannot overflow as tag_len has at most 28 bits
- if (p->buf_size < tag_len + 5)
- return 0;
-
- buf += tag_len;
-
- if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-
-AVInputFormat oma_demuxer = {
- "oma",
- NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
- 0,
- oma_read_probe,
- oma_read_header,
- oma_read_packet,
- 0,
- pcm_read_seek,
- .flags= AVFMT_GENERIC_INDEX,
- .extensions = "oma,aa3",
- .codec_tag= (const AVCodecTag* const []){codec_oma_tags, 0},
- .metadata_conv = ff_id3v2_metadata_conv,
-};
-
projects / ffmpeg / blobdiff