本文整理汇总了C++中BitstreamReader::mark方法的典型用法代码示例。如果您正苦于以下问题：C++ BitstreamReader::mark方法的具体用法？C++ BitstreamReader::mark怎么用？C++ BitstreamReader::mark使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BitstreamReader的用法示例。
在下文中一共展示了BitstreamReader::mark方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: fprintf
static PyObject*
DVDA_Title_next_track(decoders_DVDA_Title *self, PyObject *args)
{
unsigned PTS_ticks;
DVDA_Packet next_packet;
struct bs_buffer* packet_data = self->packet_data;
unsigned i;
if (!PyArg_ParseTuple(args, "I", &PTS_ticks))
return NULL;
/*ensure previous track has been exhausted, if any*/
if (self->pcm_frames_remaining) {
PyErr_SetString(PyExc_ValueError,
"current track has not been exhausted");
return NULL;
}
/*read the next packet*/
if (read_audio_packet(self->packet_reader,
&next_packet, packet_data)) {
PyErr_SetString(PyExc_IOError,
"I/O error reading initialization packet");
return NULL;
}
#else
int
DVDA_Title_next_track(decoders_DVDA_Title *self, unsigned PTS_ticks)
{
DVDA_Packet next_packet;
struct bs_buffer* packet_data = self->packet_data;
unsigned i;
if (self->pcm_frames_remaining) {
fprintf(stderr, "current track has not been exhausted\n");
return 0;
}
if (read_audio_packet(self->packet_reader,
&next_packet, packet_data)) {
fprintf(stderr, "I/O error reading initialization packet\n");
return 0;
}
#endif
if (next_packet.codec_ID == PCM_CODEC_ID) {
/*if the packet is PCM, initialize Title's stream attributes
(bits-per-sample, sample rate, channel assignment/mask)
with values taken from the first packet*/
/*PCM stores stream attributes in the second padding block*/
self->bits_per_sample =
dvda_bits_per_sample(next_packet.PCM.group_1_bps);
self->sample_rate =
dvda_sample_rate(next_packet.PCM.group_1_rate);
self->channel_assignment =
next_packet.PCM.channel_assignment;
self->channel_count =
dvda_channel_count(next_packet.PCM.channel_assignment);
self->channel_mask =
dvda_channel_mask(next_packet.PCM.channel_assignment);
self->frame_codec = PCM;
init_aobpcm_decoder(&(self->pcm_decoder),
self->bits_per_sample,
self->channel_count);
buf_extend(packet_data, self->frames);
} else if (next_packet.codec_ID == MLP_CODEC_ID) {
/*if the packet is MLP,
check if the first frame starts with a major sync*/
enum {PACKET_DATA};
BitstreamReader* r = br_open_buffer(packet_data, BS_BIG_ENDIAN);
r->mark(r, PACKET_DATA);
if (!setjmp(*br_try(r))) {
unsigned sync_words;
unsigned stream_type;
r->parse(r, "32p 24u 8u", &sync_words, &stream_type);
if ((sync_words == 0xF8726F) && (stream_type == 0xBB)) {
/*if so, discard any unconsumed packet data
and initialize Title's stream attributes
with values taken from the major sync*/
unsigned group_1_bps;
unsigned group_2_bps;
unsigned group_1_rate;
unsigned group_2_rate;
r->parse(r, "4u 4u 4u 4u 11p 5u 48p",
&group_1_bps, &group_2_bps,
&group_1_rate, &group_2_rate,
&(self->channel_assignment));
self->bits_per_sample =
dvda_bits_per_sample(group_1_bps);
self->sample_rate =
dvda_sample_rate(group_1_rate);
//.........这里部分代码省略.........