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Add seeking support in cook codec.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21806 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Mohamed Tarek 2009-07-12 14:36:06 +00:00
parent 59b9e3ab3f
commit edf3af2c68
1 changed files with 45 additions and 13 deletions
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48
apps/codecs/cook.c
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@ -41,12 +41,12 @@ static void init_rm(RMContext *rmctx)
enum codec_status codec_main(void)
{
static size_t buff_size;
int datasize, res, consumed,i;
int datasize, res, consumed, i, j, time_offset;
uint8_t *bit_buffer;
int16_t outbuf[2048] __attribute__((aligned(32)));
uint16_t fs,sps,h;
uint32_t packet_count;
int scrambling_unit_size;
int scrambling_unit_size, flag_seek_block = 0;
next_track:
if (codec_init()) {
@ -95,26 +95,58 @@ seek_start :
DEBUGF("rm_get_packet failed\n");
return CODEC_ERROR;
}
/*DEBUGF(" version = %d\n"
" length = %d\n"
" stream = %d\n"
" timestamp= %d\n",pkt.version,pkt.length,pkt.stream_number,pkt.timestamp);*/
for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++)
{
ci->yield();
if (ci->stop_codec || ci->new_track)
goto done;
if (ci->seek_time == 1) {
if (ci->seek_time) {
ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE);
ci->set_elapsed(0);
packet_count = rmctx.nb_packets;
rmctx.audio_pkt_cnt = 0;
rmctx.frame_number = 0;
if (ci->seek_time == 1) {
ci->set_elapsed(0);
ci->seek_complete();
goto seek_start;
}
j = 0;
while(1) {
rmctx.audio_pkt_cnt = 0;
bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size);
consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt);
if(consumed < 0) {
DEBUGF("rm_get_packet failed\n");
return CODEC_ERROR;
}
if(rmctx.audiotimestamp < (unsigned) ci->seek_time) {
ci->advance_buffer(consumed);
packet_count -= rmctx.audio_pkt_cnt;
rmctx.frame_number += h*(fs/sps);
j+= consumed;
}
if(rmctx.audiotimestamp > (unsigned) ci->seek_time) {
flag_seek_block = 1;
rmctx.audio_pkt_cnt = 0;
break;
}
}
if(flag_seek_block) {
ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE + j - consumed);
bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size);
consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt);
packet_count += rmctx.audio_pkt_cnt;
rmctx.frame_number -= h*(fs/sps);
time_offset = ci->seek_time - rmctx.audiotimestamp;
i = (time_offset/((sps * 8 * 1000)/rmctx.bit_rate));
flag_seek_block = 0;
ci->set_elapsed(rmctx.audiotimestamp+(1000*8*sps/rmctx.bit_rate)*i);
ci->seek_complete();
}
}
res = cook_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i], rmctx.block_align);
rmctx.frame_number++;