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Moved audio decoding outside of OMP task, and fixed all audio pops and crackles!

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This commit is contained in:
Jonathan Thomas
2012-08-21 15:31:52 -05:00
parent 0e235b0efb
commit 87db694fcf
2 changed files with 57 additions and 63 deletions
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80
src/FFmpegReader.cpp
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@@ -647,48 +647,47 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
#pragma omp critical (processing_list)
processing_audio_frames[target_frame] = target_frame;
#pragma omp task firstprivate(requested_frame, target_frame, my_cache, my_packet, starting_sample)
// Allocate audio buffer
int16_t *audio_buf = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
// create a new array (to hold the re-sampled audio)
int16_t *converted_audio = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
int packet_samples = 0;
while (my_packet->size > 0) {
// re-initialize buffer size (it gets changed in the avcodec_decode_audio2 method call)
int buf_size = AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE;
int used = avcodec_decode_audio3(aCodecCtx, audio_buf, &buf_size, my_packet);
if (used < 0) {
// Throw exception
my_packet->size = 0;
throw ErrorDecodingAudio("Error decoding audio samples", target_frame);
}
// Calculate total number of samples
packet_samples += (buf_size / av_get_bytes_per_sample(aCodecCtx->sample_fmt));
// process samples...
my_packet->data += used;
my_packet->size -= used;
}
#pragma omp critical (packet_cache)
{
// Allocate audio buffer
int16_t *audio_buf = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
// Remove packet
av_init_packet(my_packet); // TODO: this is a hack, to prevent a bug calling av_free_packet after avcodec_decode_audio3()
RemoveAVPacket(my_packet);
}
// create a new array (to hold the re-sampled audio)
int16_t *converted_audio = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
int packet_samples = 0;
while (my_packet->size > 0) {
// re-initialize buffer size (it gets changed in the avcodec_decode_audio2 method call)
int buf_size = AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE;
int used = -1;
#pragma omp critical (audio_codec)
used = avcodec_decode_audio3(aCodecCtx, audio_buf, &buf_size, my_packet);
if (used < 0) {
// Throw exception
throw ErrorDecodingAudio("Error decoding audio samples", target_frame);
my_packet->size = 0;
break;
}
// Calculate total number of samples
packet_samples += (buf_size / av_get_bytes_per_sample(aCodecCtx->sample_fmt));
// process samples...
my_packet->data += used;
my_packet->size -= used;
}
#pragma omp critical (packet_cache)
{
// Remove packet
av_init_packet(my_packet); // TODO: this is a hack, to prevent a bug calling av_free_packet after avcodec_decode_audio3()
RemoveAVPacket(my_packet);
}
#pragma omp task firstprivate(requested_frame, target_frame, my_cache, starting_sample, audio_buf, converted_audio)
{
// Re-sample audio samples (if needed)
if(aCodecCtx->sample_fmt != AV_SAMPLE_FMT_S16) {
// Audio needs to be converted
// Create an audio resample context object (used to convert audio samples)
ReSampleContext *resampleCtx = av_audio_resample_init(
@@ -715,12 +714,6 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
}
}
// DEBUG
//for (int s = 0; s < packet_samples; s++)
// audio_buf[s] = s;
int starting_frame_number = -1;
for (int channel_filter = 0; channel_filter < info.channels; channel_filter++)
{
@@ -822,7 +815,8 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
for (int f = target_frame; f < starting_frame_number; f++)
processing_audio_frames.erase(f);
}
}
} // end task
}