Displaying 2 results from an estimated 2 matches for "cur_packet_num".
2006 Jan 19
0
re: want to know, how much data will be extracted from every single packet; solved but some issues
...ood, is just auxiliary for the next one. In addition, it holds (it can be found via vorbis_packet_blocksize) size of pcm data, that the next one holds. In general every packet holds part of size of pcm data in next packet, i.e.:
? ? ? cur = vorbis_packet_blocksize(&m_vorb_info, &m_packets[cur_packet_num]);
? ? ? if ( cur <= 0 ) ?
? ? ? ?m_packets_real_lengths[cur_packet_num] = 0;
? ? ? else
? ? ? {
? ? ? ?if (prev == 0 )
? ? ? ? prev = cur;
? ? ? if (cur_packet_num > 3 && cur_packet_num < m_packets_number - 1)
? ? ? {
? ? ? ? m_packets_real_lengths[cur_packet_num] = cur +...
2006 Jan 19
0
want to know, how much data will be extracted from every single packet
...eed to seek quickly to the byte no X in unpacked audio stream as it will be uncompressed PCM.
for now when program starts, i must run through all pages, getting all packets, extracting all of them and getting result datasize using such code:
....
if (vorbis_synthesis(&vorb_block,&m_packets[cur_packet_num]) == 0)
vorbis_synthesis_blockin(&vorb_dsp_state,&vorb_block);
int bout = vorbis_synthesis_pcmout(&vorb_dsp_state,NULL);
packet_result_data_size[cur_packet_num] =
bout * sizeof(int16) * vorb_info.channels;
....
of coz it's very slow, but i can't help to solve that problem...