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Support sipr codec in old RealAudio files.

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Closes bugzilla #435


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17401 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
rtognimp 2006-01-15 21:58:10 +00:00
parent ea602ae96e
commit a35bcafdb4
1 changed files with 49 additions and 2 deletions
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51
libmpdemux/demux_realaud.c
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@ -22,6 +22,18 @@
#define FOURCC_288 mmioFOURCC('2','8','_','8')
#define FOURCC_DNET mmioFOURCC('d','n','e','t')
#define FOURCC_LPCJ mmioFOURCC('l','p','c','J')
#define FOURCC_SIPR mmioFOURCC('s','i','p','r')
static unsigned char sipr_swaps[38][2]={
{0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68},
{13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46},
{25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56},
{42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83},
{77,80} };
// Map flavour to bytes per second
static int sipr_fl2bps[4] = {813, 1062, 625, 2000}; // 6.5, 8.5, 5, 16 kbit per second
typedef struct {
@ -36,7 +48,7 @@ typedef struct {
unsigned short frame_size;
unsigned short sub_packet_size;
char genr[4];
char * audio_buf;
unsigned char *audio_buf;
} ra_priv_t;
@ -77,11 +89,37 @@ static int demux_ra_fill_buffer(demuxer_t *demuxer, demux_stream_t *dsds)
len = wf->nBlockAlign;
demuxer->filepos = stream_tell(demuxer->stream);
if (sh->format == FOURCC_288) {
if ((sh->format == FOURCC_288) || (sh->format == FOURCC_SIPR)) {
if (sh->format == FOURCC_SIPR) {
int n;
int bs = ra_priv->sub_packet_h * ra_priv->frame_size * 2 / 96; // nibbles per subpacket
stream_read(demuxer->stream, ra_priv->audio_buf, ra_priv->sub_packet_h * ra_priv->frame_size);
// Perform reordering
for(n = 0; n < 38; n++) {
int j;
int i = bs * sipr_swaps[n][0];
int o = bs * sipr_swaps[n][1];
// swap nibbles of block 'i' with 'o' TODO: optimize
for(j = 0; j < bs; j++) {
int x = (i & 1) ? (ra_priv->audio_buf[i >> 1] >> 4) : (ra_priv->audio_buf[i >> 1] & 0x0F);
int y = (o & 1) ? (ra_priv->audio_buf[o >> 1] >> 4) : (ra_priv->audio_buf[o >> 1] & 0x0F);
if(o & 1)
ra_priv->audio_buf[o >> 1] = (ra_priv->audio_buf[o >> 1] & 0x0F) | (x << 4);
else
ra_priv->audio_buf[o >> 1] = (ra_priv->audio_buf[o >> 1] & 0xF0) | x;
if(i & 1)
ra_priv->audio_buf[i >> 1] = (ra_priv->audio_buf[i >> 1] & 0x0F) | (y << 4);
else
ra_priv->audio_buf[i >> 1] = (ra_priv->audio_buf[i >> 1] & 0xF0) | y;
++i; ++o;
}
}
} else {
for (y = 0; y < ra_priv->sub_packet_h; y++)
for (x = 0; x < ra_priv->sub_packet_h / 2; x++)
stream_read(demuxer->stream, ra_priv->audio_buf + x * 2 *ra_priv->frame_size +
y * ra_priv->coded_framesize, ra_priv->coded_framesize);
}
// Release all the audio packets
for (x = 0; x < ra_priv->sub_packet_h * ra_priv->frame_size / len; x++) {
dp = new_demux_packet(len);
@ -147,10 +185,13 @@ static demuxer_t* demux_open_ra(demuxer_t* demuxer)
ra_priv->version2 = stream_read_word(demuxer->stream);
ra_priv->hdr_size = stream_read_dword(demuxer->stream);
ra_priv->codec_flavor = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Flavor: %d\n", ra_priv->codec_flavor);
ra_priv->coded_framesize = stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Coded frame size: %d\n", ra_priv->coded_framesize);
stream_skip(demuxer->stream, 4); // data size?
stream_skip(demuxer->stream, 8);
ra_priv->sub_packet_h = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Sub packet h: %d\n", ra_priv->sub_packet_h);
ra_priv->frame_size = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Frame size: %d\n", ra_priv->frame_size);
ra_priv->sub_packet_size = stream_read_word(demuxer->stream);
@ -262,6 +303,12 @@ static demuxer_t* demux_open_ra(demuxer_t* demuxer)
case FOURCC_DNET:
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: DNET -> AC3\n");
break;
case FOURCC_SIPR:
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: SIPR\n");
sh->wf->nBlockAlign = ra_priv->coded_framesize;
sh->wf->nAvgBytesPerSec = sipr_fl2bps[ra_priv->codec_flavor];
ra_priv->audio_buf = malloc(ra_priv->sub_packet_h * ra_priv->frame_size);
break;
default:
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Unknown (%d)\n", sh->format);
}