void
xtr_oggkate_c::handle_frame(xtr_frame_t &f) {
ogg_packet op;
op.b_o_s = 0;
op.e_o_s = (f.frame->get_size() == 1) && (f.frame->get_buffer()[0] == 0x7f);
op.packetno = m_packetno;
op.packet = f.frame->get_buffer();
op.bytes = f.frame->get_size();
/* we encode the backlink in the granulepos */
float f_timecode = f.timecode / 1000000000.0;
int64_t g_backlink = 0;
if (op.bytes >= static_cast<long>(1 + 3 * sizeof(int64_t)))
g_backlink = get_uint64_le(op.packet + 1 + 2 * sizeof(int64_t));
float f_backlink = g_backlink * (float)m_kate_id_header.gden / m_kate_id_header.gnum;
float f_base = f_timecode - f_backlink;
float f_offset = f_timecode - f_base;
int64_t g_base = (int64_t)(f_base * m_kate_id_header.gnum / m_kate_id_header.gden);
int64_t g_offset = (int64_t)(f_offset * m_kate_id_header.gnum / m_kate_id_header.gden);
op.granulepos = (g_base << m_kate_id_header.kfgshift) | g_offset;
ogg_stream_packetin(&m_os, &op);
flush_pages(); /* Kate is a data packet per page */
++m_packetno;
}
file_status_e
ivf_reader_c::read(generic_packetizer_c *,
bool) {
size_t remaining_bytes = m_size - m_in->getFilePointer();
ivf::frame_header_t header;
if ((sizeof(ivf::frame_header_t) > remaining_bytes) || (m_in->read(&header, sizeof(ivf::frame_header_t)) != sizeof(ivf::frame_header_t)))
return flush_packetizers();
remaining_bytes -= sizeof(ivf::frame_header_t);
uint32_t frame_size = get_uint32_le(&header.frame_size);
if (remaining_bytes < frame_size) {
m_in->setFilePointer(0, seek_end);
return flush_packetizers();
}
memory_cptr buffer = memory_c::alloc(frame_size);
if (m_in->read(buffer->get_buffer(), frame_size) < frame_size) {
m_in->setFilePointer(0, seek_end);
return flush_packetizers();
}
int64_t timestamp = get_uint64_le(&header.timestamp) * 1000000000ull * m_frame_rate_den / m_frame_rate_num;
mxverb(3, boost::format("r_ivf.cpp: key %5% header.ts %1% num %2% den %3% res %4%\n") % get_uint64_le(&header.timestamp) % m_frame_rate_num % m_frame_rate_den % timestamp % ivf::is_keyframe(buffer));
PTZR0->process(new packet_t(buffer, timestamp));
return FILE_STATUS_MOREDATA;
}
uint64_t
mm_io_c::read_uint64_le() {
unsigned char buffer[8];
if (read(buffer, 8) != 8)
throw mtx::mm_io::end_of_file_x();
return get_uint64_le(buffer);
}
static bool set_msadpcm_coeffs(unsigned char *buf)
{
int i;
int num;
uint64_t size;
buf += 16; /* skip 'fmt ' GUID */
size = get_uint64_le(buf);
if (size < 50)
{
DEBUGF("CODEC_ERROR: microsoft adpcm 'fmt ' chunk size=%d < 50\n", (int)size);
return false;
}
/* get nNumCoef */
buf += 28;
num = buf[0] | (buf[1] << 8);
/*
* In many case, nNumCoef is 7.
* Depending upon the encoder, as for this value there is a possibility of
* increasing more.
* If you found the file where this value exceeds 7, please report.
*/
if (num != MSADPCM_NUM_COEFF)
{
DEBUGF("CODEC_ERROR: microsoft adpcm nNumCoef=%d != 7\n", num);
return false;
}
/* get aCoeffs */
buf += 2;
for (i = 0; i < MSADPCM_NUM_COEFF; i++)
{
format.coeffs[i][0] = buf[0] | (SE(buf[1]) << 8);
format.coeffs[i][1] = buf[2] | (SE(buf[3]) << 8);
buf += 4;
}
return true;
}
void
xtr_oggkate_c::handle_frame(memory_cptr &frame,
KaxBlockAdditions *,
int64_t timecode,
int64_t,
int64_t,
int64_t,
bool,
bool,
bool) {
m_content_decoder.reverse(frame, CONTENT_ENCODING_SCOPE_BLOCK);
ogg_packet op;
op.b_o_s = 0;
op.e_o_s = (frame->get_size() == 1) && (frame->get_buffer()[0] == 0x7f);
op.packetno = m_packetno;
op.packet = frame->get_buffer();
op.bytes = frame->get_size();
/* we encode the backlink in the granulepos */
float f_timecode = timecode / 1000000000.0;
int64_t g_backlink = 0;
if (op.bytes >= static_cast<long>(1 + 3 * sizeof(int64_t)))
g_backlink = get_uint64_le(op.packet + 1 + 2 * sizeof(int64_t));
float f_backlink = g_backlink * (float)m_kate_id_header.gden / m_kate_id_header.gnum;
float f_base = f_timecode - f_backlink;
float f_offset = f_timecode - f_base;
int64_t g_base = (int64_t)(f_base * m_kate_id_header.gnum / m_kate_id_header.gden);
int64_t g_offset = (int64_t)(f_offset * m_kate_id_header.gnum / m_kate_id_header.gden);
op.granulepos = (g_base << m_kate_id_header.kfgshift) | g_offset;
ogg_stream_packetin(&m_os, &op);
flush_pages(); /* Kate is a data packet per page */
++m_packetno;
}
/* this is the codec entry point */
enum codec_status codec_main(void)
{
int status;
uint32_t decodedsamples;
size_t n;
int bufcount;
int endofstream;
unsigned char *buf;
uint8_t *wavbuf;
off_t firstblockposn; /* position of the first block in file */
const struct pcm_codec *codec;
uint64_t size;
/* Generic codec initialisation */
ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
next_track:
status = CODEC_OK;
if (codec_init()) {
DEBUGF("codec_init() error\n");
status = CODEC_ERROR;
goto exit;
}
if (codec_wait_taginfo() != 0)
goto done;
codec_set_replaygain(ci->id3);
/* Need to save offset for later use (cleared indirectly by advance_buffer) */
bytesdone = ci->id3->offset;
/* get RIFF chunk header */
buf = ci->request_buffer(&n, 40);
if (n < 40) {
DEBUGF("request_buffer error\n");
status = CODEC_ERROR;
goto done;
}
if ((memcmp(buf , WAVE64_GUID_RIFF, 16) != 0) ||
(memcmp(buf+24, WAVE64_GUID_WAVE, 16) != 0))
{
status = CODEC_ERROR;
goto done;
}
/* advance to first WAVE chunk */
ci->advance_buffer(40);
firstblockposn = 40;
ci->memset(&format, 0, sizeof(struct pcm_format));
format.is_signed = true;
format.is_little_endian = true;
decodedsamples = 0;
codec = 0;
/* iterate over WAVE chunks until the 'data' chunk, which should be after the 'fmt ' chunk */
while (true) {
/* get WAVE chunk header */
buf = ci->request_buffer(&n, 1024);
if (n < 8) {
DEBUGF("data chunk request_buffer error\n");
/* no more chunks, 'data' chunk must not have been found */
status = CODEC_ERROR;
goto done;
}
/* chunkSize */
size = get_uint64_le(buf+16) - 24;
if (memcmp(buf, WAVE64_GUID_FMT, 16) == 0) {
if (size < 16) {
DEBUGF("CODEC_ERROR: 'fmt ' chunk size=%d < 16\n", (int)size);
status = CODEC_ERROR;
goto done;
}
/* wFormatTag */
format.formattag=buf[24]|(buf[25]<<8);
/* wChannels */
format.channels=buf[26]|(buf[27]<<8);
/* skipping dwSamplesPerSec */
/* skipping dwAvgBytesPerSec */
/* wBlockAlign */
format.blockalign=buf[36]|(buf[37]<<8);
/* wBitsPerSample */
format.bitspersample=buf[38]|(buf[39]<<8);
if (format.formattag != WAVE_FORMAT_PCM) {
if (size < 18) {
/* this is not a fatal error with some formats,
* we'll see later if we can't decode it */
DEBUGF("CODEC_WARNING: non-PCM WAVE (formattag=0x%x) "
"doesn't have ext. fmt descr (chunksize=%d<18).\n",
(unsigned int)format.formattag, (int)size);
}
else
{
if (format.formattag != WAVE_FORMAT_EXTENSIBLE)
format.samplesperblock = buf[42]|(buf[43]<<8);
else {
format.size = buf[40]|(buf[41]<<8);
if (format.size < 22) {
DEBUGF("CODEC_ERROR: WAVE_FORMAT_EXTENSIBLE is "
"missing extension\n");
status = CODEC_ERROR;
goto done;
}
/* wValidBitsPerSample */
format.bitspersample = buf[42]|(buf[43]<<8);
/* skipping dwChannelMask (4bytes) */
/* SubFormat (only get the first two bytes) */
format.formattag = buf[48]|(buf[49]<<8);
}
}
}
/* msadpcm specific */
if (format.formattag == WAVE_FORMAT_ADPCM)
{
if (!set_msadpcm_coeffs(buf))
{
status = CODEC_ERROR;
goto done;
}
}
/* get codec */
codec = get_wave_codec(format.formattag);
if (!codec)
{
DEBUGF("CODEC_ERROR: unsupported wave format 0x%x\n",
(unsigned int) format.formattag);
status = CODEC_ERROR;
goto done;
}
/* riff 8bit linear pcm is unsigned */
if (format.formattag == WAVE_FORMAT_PCM && format.bitspersample == 8)
format.is_signed = false;
/* check format, and calculate chunk size */
if (!codec->set_format(&format))
{
status = CODEC_ERROR;
goto done;
}
} else if (memcmp(buf, WAVE64_GUID_DATA, 16) == 0) {
format.numbytes = size;
/* advance to start of data */
ci->advance_buffer(24);
firstblockposn += 24;
break;
} else if (memcmp(buf, WAVE64_GUID_FACT, 16) == 0) {
/* skip 'fact' chunk */
} else {
DEBUGF("unknown Wave64 chunk: "
"'%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'\n",
buf[0], buf[1], buf[ 2], buf[ 3], buf[ 4], buf[ 5], buf[ 6], buf[ 7],
buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]);
}
/* go to next chunk (8byte bound) */
size += 24 + ((1 + ~size) & 0x07);
ci->advance_buffer(size);
firstblockposn += size;
}
if (!codec)
{
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found\n");
status = CODEC_ERROR;
goto done;
}
/* common format check */
if (format.channels == 0) {
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-channels file\n");
status = CODEC_ERROR;
goto done;
}
if (format.samplesperblock == 0) {
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-wSamplesPerBlock file\n");
status = CODEC_ERROR;
goto done;
}
if (format.blockalign == 0)
{
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-blockalign file\n");
status = CODEC_ERROR;
goto done;
}
if (format.numbytes == 0) {
DEBUGF("CODEC_ERROR: 'data' chunk not found or has zero-length\n");
status = CODEC_ERROR;
goto done;
}
/* check chunksize */
if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
> PCM_SAMPLE_SIZE)
format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
if (format.chunksize == 0)
{
DEBUGF("CODEC_ERROR: chunksize is 0\n");
status = CODEC_ERROR;
goto done;
}
ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
if (format.channels == 2) {
ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
} else if (format.channels == 1) {
ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
} else {
DEBUGF("CODEC_ERROR: more than 2 channels\n");
status = CODEC_ERROR;
goto done;
}
/* make sure we're at the correct offset */
if (bytesdone > (uint32_t) firstblockposn) {
/* Round down to previous block */
struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn,
PCM_SEEK_POS, &read_buffer);
if (newpos->pos > format.numbytes)
goto done;
if (ci->seek_buffer(firstblockposn + newpos->pos))
{
bytesdone = newpos->pos;
decodedsamples = newpos->samples;
}
ci->seek_complete();
} else {
/* already where we need to be */
bytesdone = 0;
}
/* The main decoder loop */
endofstream = 0;
while (!endofstream) {
ci->yield();
if (ci->stop_codec || ci->new_track) {
break;
}
if (ci->seek_time) {
struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, PCM_SEEK_TIME,
&read_buffer);
if (newpos->pos > format.numbytes)
break;
if (ci->seek_buffer(firstblockposn + newpos->pos))
{
bytesdone = newpos->pos;
decodedsamples = newpos->samples;
}
ci->seek_complete();
}
wavbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
if (n == 0)
break; /* End of stream */
if (bytesdone + n > format.numbytes) {
n = format.numbytes - bytesdone;
endofstream = 1;
}
status = codec->decode(wavbuf, n, samples, &bufcount);
if (status == CODEC_ERROR)
{
DEBUGF("codec error\n");
goto done;
}
ci->pcmbuf_insert(samples, NULL, bufcount);
ci->advance_buffer(n);
bytesdone += n;
decodedsamples += bufcount;
if (bytesdone >= format.numbytes)
endofstream = 1;
ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
}
status = CODEC_OK;
done:
if (ci->request_next_track())
goto next_track;
exit:
return status;
}
