AVDecoder.cpp
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#include "AVDecoder.h"
CAVDecoder::CAVDecoder() :
_a_start_time_ms(INT64_MAX),
_v_start_time_ms(INT64_MAX),
_cur_a_ts_ms(INT64_MAX),
_cur_v_ts_ms(INT64_MAX),
_end_time_ms(0),
_cur_a_frame(NULL),
_cur_v_frame(NULL),
_media_role(mr_student)
{
}
CAVDecoder::~CAVDecoder()
{
}
int CAVDecoder::add(media_info &info)
{
_media_role = info.m_role;
_uid = info.uid;
if (info.m_type == mt_audio) {
_a_start_time_ms = info.start_time_ms;
_a_end_time_ms = info.end_time_ms;
_audio_info.push_back(info);
_audio_decoder.add(info);
}
else {
_v_start_time_ms = info.start_time_ms;
_v_end_time_ms = info.end_time_ms;
_video_info.push_back(info);
_video_decoder.add(info);
}
if (_cur_a_ts_ms == INT64_MAX) {
_cur_a_ts_ms = info.start_time_ms;
_cur_v_ts_ms = info.start_time_ms;
}
if (_end_time_ms < info.end_time_ms) {
_end_time_ms = info.end_time_ms;
}
av_log(NULL, AV_LOG_INFO, "CAVDecoder add info:%lf, %"PRIu64", %"PRIu64"\n", _cur_a_ts_ms, _cur_v_ts_ms, _end_time_ms);
return 0;
}
unsigned int CAVDecoder::getuid()
{
return _uid;
}
bool CAVDecoder::get_one_v_frame()
{
int64_t ts;
int ret = -1;
if (_video_info.size()) {
ret = _video_decoder.get_one_frame(&_cur_v_frame, ts);
if (ret == 0) {
//_cur_v_ts_ms = _v_start_time_ms + ts;
_cur_v_ts_ms += VFRAME_DURATION_MS;
}
else {
_video_info.pop_front();
if (_cur_v_ts_ms < _end_time_ms) {
_cur_v_ts_ms += VFRAME_DURATION_MS;//return last v frame
ret = 0;
}
}
}
if (ret) {//no video decoded
if (_cur_v_ts_ms < _end_time_ms) {//should have as video frame
_cur_v_ts_ms += VFRAME_DURATION_MS;//return last v frame
ret = 0;
if (!_cur_v_frame) {
_cur_v_frame = get_blank_frame();
}
}
}
return ret == 0;
}
AVFrame * CAVDecoder::get_blank_frame()
{
return NULL;
}
AVFrame * CAVDecoder::get_silence_frame()
{
return NULL;
}
void CAVDecoder::free_cur_a_frame()
{
if (_cur_a_frame) {
av_frame_free(&_cur_a_frame);
}
}
void CAVDecoder::free_cur_v_frame()
{
if (_cur_v_frame) {
av_frame_free(&_cur_v_frame);
}
}
bool CAVDecoder::get_one_a_frame()
{
int64_t ts;
int ret = -1;
if (_audio_info.size()) {
ret = _audio_decoder.get_one_frame(&_cur_a_frame, ts);
if (ret == 0) {
_cur_a_ts_ms += AFRAME_DURATION_MS;
}
else {
_audio_info.pop_front();
if (_cur_a_ts_ms < _end_time_ms) {
_cur_a_ts_ms += AFRAME_DURATION_MS;//return silence frame
ret = 0;
}
}
}
if (ret) {//no video decoded
if (_cur_a_ts_ms < _end_time_ms) {//should have a audio frame
_cur_a_ts_ms += AFRAME_DURATION_MS;//return last a frame
ret = 0;
if (!_cur_a_frame) {
_cur_a_frame = get_silence_frame();
}
}
}
return ret == 0;
}