X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Foma.c;h=f6454d97afe4011bd9650ef2ff039815292fafc2;hb=6e9bbc6525989f7dc51acc76712c6ca674053b60;hp=6fdf75f17c11e09e6d45b522b6ae4e730ad6ab2b;hpb=4c1e56ede86b68b5c600bde4ebeea6153c46f7f9;p=ffmpeg diff --git a/libavformat/oma.c b/libavformat/oma.c index 6fdf75f17c1..f6454d97afe 100644 --- a/libavformat/oma.c +++ b/libavformat/oma.c @@ -1,8 +1,5 @@ /* - * Sony OpenMG (OMA) demuxer - * - * Copyright (c) 2008 Maxim Poliakovski - * 2008 Benjamin Larsson + * Sony OpenMG (OMA) common data * * This file is part of Libav. * @@ -21,188 +18,16 @@ * 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 = avio_read(s->pb, buf, EA3_HEADER_SIZE); - if (ret < EA3_HEADER_SIZE) - return -1; - - 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_ask_for_sample(s, "Unsupported sample rate: %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 ff_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}, -}; -