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Make RM demuxer look more like proper demuxer by introducing codec tags 

instead of many strcmp() on always four-byte strings.
Idea borrowed from RM demuxer in FFmbc by Baptiste Coudurier.

Originally committed as revision 20819 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2009-12-13 08:51:27 +00:00
parent 851ef8755b
commit 461ef74116
1 changed files with 35 additions and 13 deletions
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48
libavformat/rmdec.c
View File

@ -22,6 +22,7 @@
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "riff.h"
#include "rm.h"
struct RMStream {
@ -48,6 +49,23 @@ typedef struct {
int audio_pkt_cnt; ///< Output packet counter
} RMDemuxContext;
static const AVCodecTag rm_codec_tags[] = {
{ CODEC_ID_RV10, MKTAG('R','V','1','0') },
{ CODEC_ID_RV20, MKTAG('R','V','2','0') },
{ CODEC_ID_RV20, MKTAG('R','V','T','R') },
{ CODEC_ID_RV30, MKTAG('R','V','3','0') },
{ CODEC_ID_RV40, MKTAG('R','V','4','0') },
{ CODEC_ID_AC3, MKTAG('d','n','e','t') },
{ CODEC_ID_RA_144, MKTAG('l','p','c','J') },
{ CODEC_ID_RA_288, MKTAG('2','8','_','8') },
{ CODEC_ID_COOK, MKTAG('c','o','o','k') },
{ CODEC_ID_ATRAC3, MKTAG('a','t','r','c') },
{ CODEC_ID_SIPR, MKTAG('s','i','p','r') },
{ CODEC_ID_AAC, MKTAG('r','a','a','c') },
{ CODEC_ID_AAC, MKTAG('r','a','c','p') },
{ 0 },
};
static const unsigned char sipr_swaps[38][2] = {
{ 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
{ 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
@ -161,11 +179,13 @@ static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
get_str8(pb, buf, sizeof(buf)); /* desc */
}
st->codec->codec_type = CODEC_TYPE_AUDIO;
if (!strcmp(buf, "dnet")) {
st->codec->codec_id = CODEC_ID_AC3;
st->codec->codec_tag = AV_RL32(buf);
st->codec->codec_id = ff_codec_get_id(rm_codec_tags, st->codec->codec_tag);
switch (st->codec->codec_id) {
case CODEC_ID_AC3:
st->need_parsing = AVSTREAM_PARSE_FULL;
} else if (!strcmp(buf, "28_8")) {
st->codec->codec_id = CODEC_ID_RA_288;
break;
case CODEC_ID_RA_288:
st->codec->extradata_size= 0;
ast->audio_framesize = st->codec->block_align;
st->codec->block_align = coded_framesize;
@ -176,7 +196,10 @@ static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
}
av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
} else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
break;
case CODEC_ID_COOK:
case CODEC_ID_ATRAC3:
case CODEC_ID_SIPR:
get_be16(pb); get_byte(pb);
if (((version >> 16) & 0xff) == 5)
get_byte(pb);
@ -215,7 +238,8 @@ static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
}
av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
} else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
break;
case CODEC_ID_AAC:
get_be16(pb); get_byte(pb);
if (((version >> 16) & 0xff) == 5)
get_byte(pb);
@ -231,8 +255,8 @@ static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
get_byte(pb);
get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
}
} else {
st->codec->codec_id = CODEC_ID_NONE;
break;
default:
av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
}
if (read_all) {
@ -268,12 +292,9 @@ ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
goto skip;
}
st->codec->codec_tag = get_le32(pb);
st->codec->codec_id = ff_codec_get_id(rm_codec_tags, st->codec->codec_tag);
// av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
&& st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
&& st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
&& st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
&& st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
if (st->codec->codec_id == CODEC_ID_NONE)
goto fail1;
st->codec->width = get_be16(pb);
st->codec->height = get_be16(pb);
@ -298,6 +319,7 @@ ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
// av_log(s, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
st->codec->time_base.den = fps * st->codec->time_base.num;
//XXX: do we really need that?
switch(((uint8_t*)st->codec->extradata)[4]>>4){
case 1: st->codec->codec_id = CODEC_ID_RV10; break;
case 2: st->codec->codec_id = CODEC_ID_RV20; break;