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AMR-WB support by (Johannes Carlsson <joca at rixmail dot se>)

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Originally committed as revision 2311 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-09-28 20:34:11 +00:00
parent cd1f22f97e
commit d663a1fdc0
10 changed files with 395 additions and 114 deletions
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182
libavformat/amr.c
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@@ -20,34 +20,34 @@
/*
Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.txt?number=3267
Only amr narrowband (not amr-wb) is supported for now.
Only mono files are supported.
*/
#include "avformat.h"
#include "avi.h"
static const unsigned char AMR_header [] = "#!AMR\n";
/* AMR_FILE header */
static int put_amr_header(ByteIOContext *pb, AVCodecContext *enc)
{
put_tag(pb, AMR_header); /* magic number */
return 0;
}
static const unsigned char AMRWB_header [] = "#!AMR-WB\n";
static int amr_write_header(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
AVCodecContext *enc = &s->streams[0]->codec;
s->priv_data = NULL;
/* format header */
if (put_amr_header(pb, &s->streams[0]->codec) < 0) {
return -1;
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
{
//This is an error!
}
put_flush_packet(pb);
return 0;
}
@@ -66,10 +66,13 @@ static int amr_write_trailer(AVFormatContext *s)
static int amr_probe(AVProbeData *p)
{
/* check file header */
if (p->buf_size < 6)
//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,6)==0)
if(memcmp(p->buf,AMR_header,5)==0)
return AVPROBE_SCORE_MAX;
else
return 0;
@@ -81,24 +84,44 @@ static int amr_read_header(AVFormatContext *s,
{
ByteIOContext *pb = &s->pb;
AVStream *st;
uint8_t header[6];
uint8_t header[9];
get_buffer(pb, header, 6);
if(memcmp(header,AMR_header,6)!=0)
{
return -1;
get_buffer(pb, header+6, 3);
if(memcmp(header,AMRWB_header,9)!=0)
{
return -1;
}
st = av_new_stream(s, 0);
if (!st)
{
return AVERROR_NOMEM;
}
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_tag = CODEC_ID_AMR_WB;
st->codec.codec_id = CODEC_ID_AMR_WB;
st->codec.channels = 1;
st->codec.sample_rate = 16000;
}
else
{
st = av_new_stream(s, 0);
if (!st)
{
return AVERROR_NOMEM;
}
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_tag = CODEC_ID_AMR_NB;
st->codec.codec_id = CODEC_ID_AMR_NB;
st->codec.channels = 1;
st->codec.sample_rate = 8000;
}
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_tag = CODEC_ID_AMR_NB;
st->codec.codec_id = CODEC_ID_AMR_NB;
st->codec.channels = 1;
st->codec.sample_rate = 8000;
return 0;
}
@@ -107,39 +130,82 @@ static int amr_read_header(AVFormatContext *s,
static int amr_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
static uint16_t packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
uint8_t toc, q, ft;
int read;
int size;
AVCodecContext *enc = &s->streams[0]->codec;
if (url_feof(&s->pb))
return -EIO;
toc=0;
toc=get_byte(&s->pb);
q = (toc >> 2) & 0x01;
ft = (toc >> 3) & 0x0F;
size=packed_size[ft];
//printf("amr_read_packet size=%d\n",size);
if (av_new_packet(pkt, size+1))
return -EIO;
pkt->stream_index = 0;
pkt->data[0]=toc;
read = get_buffer(&s->pb, pkt->data+1, size);
if (read != size)
if (enc->codec_id == CODEC_ID_AMR_NB)
{
const static uint8_t packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
uint8_t toc, q, ft;
int read;
int size;
if (url_feof(&s->pb))
{
return -EIO;
}
toc=get_byte(&s->pb);
q = (toc >> 2) & 0x01;
ft = (toc >> 3) & 0x0F;
size=packed_size[ft];
if (av_new_packet(pkt, size+1))
{
return -EIO;
}
pkt->stream_index = 0;
pkt->data[0]=toc;
read = get_buffer(&s->pb, pkt->data+1, size);
if (read != size)
{
av_free_packet(pkt);
return -EIO;
}
return 0;
}
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};
uint8_t toc, mode;
int read;
int size;
if (url_feof(&s->pb))
{
return -EIO;
}
toc=get_byte(&s->pb);
mode = (uint8_t)((toc >> 3) & 0x0F);
size = packed_size[mode];
if ( (size==0) || av_new_packet(pkt, size))
{
return -EIO;
}
pkt->stream_index = 0;
pkt->data[0]=toc;
read = get_buffer(&s->pb, pkt->data+1, size-1);
if (read != (size-1))
{
av_free_packet(pkt);
return -EIO;
}
return 0;
}
else
{
av_free_packet(pkt);
return -EIO;
}
return 0;
}
static int amr_read_close(AVFormatContext *s)
@@ -150,7 +216,7 @@ static int amr_read_close(AVFormatContext *s)
static AVInputFormat amr_iformat = {
"amr",
"3gpp amr file format",
0,
0, /*priv_data_size*/
amr_probe,
amr_read_header,
amr_read_packet,