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Get rid of weird pre reading code.

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Originally committed as revision 14000 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-06-26 22:53:43 +00:00
parent d0b76b98c4
commit a4fe6826de
1 changed files with 38 additions and 71 deletions
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109
libavformat/psxstr.c
View file

@ -94,11 +94,9 @@ static int str_read_header(AVFormatContext *s,
{
ByteIOContext *pb = s->pb;
StrDemuxContext *str = s->priv_data;
AVStream *st;
unsigned char sector[RAW_CD_SECTOR_SIZE];
int start;
int i;
int channel;
/* skip over any RIFF header */
if (get_buffer(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
@ -115,75 +113,7 @@ static int str_read_header(AVFormatContext *s,
str->channels[i].audio_stream_index= -1;
}
/* check through the first 32 sectors for individual channels */
for (i = 0; i < 32; i++) {
if (get_buffer(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
return AVERROR(EIO);
channel = sector[0x11];
if (channel >= 32)
return AVERROR_INVALIDDATA;
switch (sector[0x12] & CDXA_TYPE_MASK) {
case CDXA_TYPE_DATA:
case CDXA_TYPE_VIDEO:
/* qualify the magic number */
if (AV_RL32(&sector[0x18]) != STR_MAGIC)
break;
if(str->channels[channel].video_stream_index != -1)
break;
/* allocate a new AVStream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
av_set_pts_info(st, 64, 1, 15);
str->channels[channel].video_stream_index = st->index;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_MDEC;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = AV_RL16(&sector[0x28]);
st->codec->height = AV_RL16(&sector[0x2A]);
break;
case CDXA_TYPE_AUDIO:
{
int fmt;
if(str->channels[channel].audio_stream_index != -1)
break;
/* allocate a new AVStream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
str->channels[channel].audio_stream_index = st->index;
fmt = sector[0x13];
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_ADPCM_XA;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->channels = (fmt&1)?2:1;
st->codec->sample_rate = (fmt&4)?18900:37800;
// st->codec->bit_rate = 0; //FIXME;
st->codec->block_align = 128;
av_set_pts_info(st, 64, 128, st->codec->sample_rate);
}
break;
default:
/* ignore */
break;
}
}
/* back to the start */
url_fseek(pb, start, SEEK_SET);
s->ctx_flags |= AVFMTCTX_NOHEADER;
return 0;
}
@ -196,6 +126,7 @@ static int str_read_packet(AVFormatContext *s,
unsigned char sector[RAW_CD_SECTOR_SIZE];
int channel;
AVPacket *pkt;
AVStream *st;
while (1) {
@ -223,6 +154,22 @@ static int str_read_packet(AVFormatContext *s,
return AVERROR_INVALIDDATA;
}
if(str->channels[channel].video_stream_index < 0){
/* allocate a new AVStream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
av_set_pts_info(st, 64, 1, 15);
str->channels[channel].video_stream_index = st->index;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_MDEC;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = AV_RL16(&sector[0x28]);
st->codec->height = AV_RL16(&sector[0x2A]);
}
/* if this is the first sector of the frame, allocate a pkt */
pkt = &str->channels[channel].tmp_pkt;
@ -254,6 +201,26 @@ static int str_read_packet(AVFormatContext *s,
break;
case CDXA_TYPE_AUDIO:
if(str->channels[channel].audio_stream_index < 0){
int fmt;
/* allocate a new AVStream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
str->channels[channel].audio_stream_index = st->index;
fmt = sector[0x13];
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_ADPCM_XA;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->channels = (fmt&1)?2:1;
st->codec->sample_rate = (fmt&4)?18900:37800;
// st->codec->bit_rate = 0; //FIXME;
st->codec->block_align = 128;
av_set_pts_info(st, 64, 128, st->codec->sample_rate);
}
pkt = ret_pkt;
if (av_new_packet(pkt, 2304))
return AVERROR(EIO);