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Add metadata support. Patch by Michael Karcher.

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Originally committed as revision 23639 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Karcher
2010-06-17 10:59:49 +00:00
committed by Maxim Poliakovski
parent 8a2679ada4
commit 6afd0ee3b2
2 changed files with 25 additions and 26 deletions
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2
libavformat/Makefile
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@@ -158,7 +158,7 @@ OBJS-$(CONFIG_OGG_DEMUXER) += oggdec.o \
vorbiscomment.o
OBJS-$(CONFIG_OGG_MUXER) += oggenc.o \
vorbiscomment.o
OBJS-$(CONFIG_OMA_DEMUXER) += oma.o raw.o
OBJS-$(CONFIG_OMA_DEMUXER) += oma.o raw.o id3v2.o
OBJS-$(CONFIG_PCM_ALAW_DEMUXER) += raw.o
OBJS-$(CONFIG_PCM_ALAW_MUXER) += raw.o
OBJS-$(CONFIG_PCM_F32BE_DEMUXER) += raw.o

49
libavformat/oma.c
View File

@@ -27,7 +27,8 @@
*
* Known file extensions: ".oma", "aa3"
* The format of such files consists of three parts:
* - "ea3" header carrying overall info and metadata.
* - "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)
@@ -46,6 +47,7 @@
#include "libavutil/intreadwrite.h"
#include "raw.h"
#include "riff.h"
#include "id3v2.h"
#define EA3_HEADER_SIZE 96
@@ -63,36 +65,21 @@ static const AVCodecTag codec_oma_tags[] = {
{ 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, ea3_taglen, EA3_pos, framesize, jsflag, samplerate;
int ret, framesize, jsflag, samplerate;
uint32_t codec_params;
int16_t eid;
uint8_t buf[EA3_HEADER_SIZE];
uint8_t *edata;
AVStream *st;
ret = get_buffer(s->pb, buf, 10);
if (ret != 10)
return -1;
if(!memcmp(buf, "ea3", 3)) {
ea3_taglen = ((buf[6] & 0x7f) << 21) | ((buf[7] & 0x7f) << 14) | ((buf[8] & 0x7f) << 7) | (buf[9] & 0x7f);
EA3_pos = ea3_taglen + 10;
if (buf[5] & 0x10)
EA3_pos += 10;
url_fseek(s->pb, EA3_pos, SEEK_SET);
ret = get_buffer(s->pb, buf, EA3_HEADER_SIZE);
if (ret != EA3_HEADER_SIZE)
return -1;
} else {
ret = get_buffer(s->pb, buf + 10, EA3_HEADER_SIZE - 10);
EA3_pos = 0;
}
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");
@@ -163,7 +150,6 @@ static int oma_read_header(AVFormatContext *s,
}
st->codec->block_align = framesize;
url_fseek(s->pb, EA3_pos + EA3_HEADER_SIZE, SEEK_SET);
return 0;
}
@@ -182,9 +168,21 @@ static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
static int oma_read_probe(AVProbeData *p)
{
if (!memcmp(p->buf, ((const uint8_t[]){'e', 'a', '3', 3, 0}), 5) ||
(!memcmp(p->buf, "EA3", 3) &&
!p->buf[4] && p->buf[5] == EA3_HEADER_SIZE))
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;
@@ -203,5 +201,6 @@ AVInputFormat oma_demuxer = {
.flags= AVFMT_GENERIC_INDEX,
.extensions = "oma,aa3",
.codec_tag= (const AVCodecTag* const []){codec_oma_tags, 0},
.metadata_conv = ff_id3v2_metadata_conv,
};