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Code Issues Releases Wiki Activity

improved audio codec detection

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3789 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
alex 2001-12-27 10:15:13 +00:00
parent a527e0f508
commit ecee4bef8c
1 changed files with 91 additions and 10 deletions
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101
libmpdemux/demux_real.c
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@ -6,6 +6,18 @@
Based on FFmpeg's libav/rm.c.
*/
/*
Some codecs for Real (from Mike Melanson):
RV10: As has been mentioned, H.263-based; not an unreasonable guess
RV20: RealVideo 2.0, nothing known
RV30: RealVideo 3.0,nothing known, but I don't believe I've ever seen any
media encoded with it
DNET: apparently one of their original audio codecs, to be used with music
SIPR: SiprNet, based on ACELP, and is great for compressing voice
COKR(?): Cooker, the fabled G2 audio codec
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
@ -204,12 +216,54 @@ void demux_open_real(demuxer_t* demuxer)
stream_skip(demuxer->stream, 2); /* flags */
break;
case MKTAG('C', 'O', 'N', 'T'):
{
char *buf;
int len;
printf("Broadcasting informations (title, author, copyright, comment)\n");
skip_str(0, demuxer); /* title */
skip_str(0, demuxer); /* author */
skip_str(0, demuxer); /* copyright */
skip_str(0, demuxer); /* comment */
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
demux_info_add(demuxer, "name", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
demux_info_add(demuxer, "author", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
demux_info_add(demuxer, "copyright", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
demux_info_add(demuxer, "comment", buf);
free(buf);
}
// skip_str(0, demuxer); /* title */
// skip_str(0, demuxer); /* author */
// skip_str(0, demuxer); /* copyright */
// skip_str(0, demuxer); /* comment */
break;
}
case MKTAG('M', 'D', 'P', 'R'):
{
/* new stream */
@ -242,10 +296,12 @@ void demux_open_real(demuxer_t* demuxer)
sh_audio_t *sh = new_sh_audio(demuxer, stream_id);
printf("Found audio stream!\n");
stream_skip(demuxer->stream, 4); /* version */
stream_skip(demuxer->stream, 4); /* .ra4 */
stream_skip(demuxer->stream, 4);
// printf("pos: %x\n", stream_tell(demuxer->stream));
stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 2);
stream_skip(demuxer->stream, 4); /* .ra4 or .ra5 */
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 4); /* header size */
stream_skip(demuxer->stream, 2); /* add codec info */
stream_skip(demuxer->stream, 4); /* coded frame size */
@ -263,16 +319,28 @@ void demux_open_real(demuxer_t* demuxer)
{
char buf[128];
get_str(1, demuxer, buf, sizeof(buf));
skip_str(1, demuxer);
// get_str(1, demuxer, buf, sizeof(buf));
get_str(1, demuxer, buf, sizeof(buf));
v = 0; /* not supported audio codec */
if (!strcmp(buf, "dnet"))
if (strstr(buf, "dnet"))
{
printf("Found AC3 audio\n");
sh->format = 0x2000; /* ac3 */
v = 1;
}
if (strstr(buf, "sipr"))
{
printf("Found SiproLab's ACELP\n");
sh->format = 0x130;
v = 1;
}
if (strstr(buf, "cook"))
{
printf("Found Real's GeneralCooker (unsupported)\n");
v = 0;
}
}
// skip_str(1, demuxer); /* desc */
// skip_str(1, demuxer); /* desc */
@ -283,7 +351,18 @@ void demux_open_real(demuxer_t* demuxer)
if (v)
{
printf("Audio codec: 0x%x\n", sh->format);
/* Emulate WAVEFORMATEX struct: */
sh->wf = malloc(sizeof(WAVEFORMATEX));
memset(sh->wf, 0, sizeof(WAVEFORMATEX));
sh->wf->wFormatTag = sh->format;
sh->wf->nChannels = sh->channels;
sh->wf->wBitsPerSample = 16;
sh->wf->nSamplesPerSec = sh->samplerate;
sh->wf->nAvgBytesPerSec = bitrate;
sh->wf->nBlockAlign = 19; /* 19 for acelp, pff */
sh->wf->cbSize = 0;
/* insert as stream */
demuxer->audio->sh = sh;
sh->ds = demuxer->audio;
@ -345,10 +424,12 @@ void demux_open_real(demuxer_t* demuxer)
/* codec id: rv10 */
break;
case 0x20001000:
case 0x20100001:
/* codec id: rv20 */
break;
default:
/* codec id: none */
printf("unknown id: %x\n", v);
}
/* insert as stream */