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Refactored to allocate less memory when not resampling audio during encoding

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This commit is contained in:
Jonathan Thomas
2012-08-21 21:51:00 -05:00
parent 927f320702
commit b4873d566f
2 changed files with 14 additions and 8 deletions
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18
src/FFmpegReader.cpp
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@@ -652,9 +652,6 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
// 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)
@@ -684,10 +681,17 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
#pragma omp task firstprivate(requested_frame, target_frame, my_cache, starting_sample, audio_buf, converted_audio)
#pragma omp task firstprivate(requested_frame, target_frame, my_cache, starting_sample, audio_buf)
{
// create a new array (to hold the re-sampled audio)
int16_t *converted_audio = NULL;
// Re-sample audio samples (if needed)
if(aCodecCtx->sample_fmt != AV_SAMPLE_FMT_S16) {
// Init resample buffer
converted_audio = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
// Audio needs to be converted
// Create an audio resample context object (used to convert audio samples)
ReSampleContext *resampleCtx = av_audio_resample_init(
@@ -709,6 +713,10 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
// Copy audio samples over original samples
memcpy(audio_buf, converted_audio, packet_samples * av_get_bytes_per_sample(AV_SAMPLE_FMT_S16));
// Deallocate resample buffer
delete[] converted_audio;
converted_audio = NULL;
// Close context
audio_resample_close(resampleCtx);
}
@@ -805,8 +813,6 @@ void FFmpegReader::ProcessAudioPacket(int requested_frame, int target_frame, int
// Clean up some arrays
delete[] audio_buf;
audio_buf = NULL;
delete[] converted_audio;
converted_audio = NULL;
// Add video frame to list of processing video frames
#pragma omp critical (processing_list)