itsmattkc
40b3879440
Major refactoring work to try sharing as much code as possible between the video renderers and audio renderers, as well as make them as platform-independent as possible.
116 lines
2.3 KiB
C++
116 lines
2.3 KiB
C++
#include "audioparams.h"
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extern "C" {
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#include <libavformat/avformat.h>
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}
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AudioParams::AudioParams() :
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sample_rate_(0),
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channel_layout_(0)
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{
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}
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AudioParams::AudioParams(const int &sample_rate, const uint64_t &channel_layout) :
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sample_rate_(sample_rate),
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channel_layout_(channel_layout)
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{
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}
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const int &AudioParams::sample_rate() const
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{
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return sample_rate_;
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}
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const uint64_t &AudioParams::channel_layout() const
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{
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return channel_layout_;
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}
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AudioRenderingParams::AudioRenderingParams() :
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format_(SAMPLE_FMT_INVALID)
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{
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}
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AudioRenderingParams::AudioRenderingParams(const int &sample_rate, const uint64_t &channel_layout, const SampleFormat &format) :
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AudioParams(sample_rate, channel_layout),
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format_(format)
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{
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}
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AudioRenderingParams::AudioRenderingParams(const AudioParams ¶ms, const SampleFormat &format) :
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AudioParams(params),
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format_(format)
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{
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}
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const SampleFormat &AudioRenderingParams::format() const
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{
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return format_;
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}
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int AudioRenderingParams::time_to_bytes(const rational &time) const
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{
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Q_ASSERT(is_valid());
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return time_to_samples(time) * channel_count() * bytes_per_sample_per_channel();
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}
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int AudioRenderingParams::time_to_samples(const rational &time) const
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{
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Q_ASSERT(is_valid());
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return qFloor(time.toDouble() * sample_rate());
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}
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int AudioRenderingParams::samples_to_bytes(const int &samples) const
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{
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Q_ASSERT(is_valid());
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return samples * channel_count() * bytes_per_sample_per_channel();
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}
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int AudioRenderingParams::channel_count() const
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{
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return av_get_channel_layout_nb_channels(channel_layout());
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}
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int AudioRenderingParams::bytes_per_sample_per_channel() const
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{
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switch (format_) {
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case SAMPLE_FMT_U8:
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return 1;
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case SAMPLE_FMT_S16:
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return 2;
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case SAMPLE_FMT_S32:
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case SAMPLE_FMT_FLT:
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return 4;
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case SAMPLE_FMT_DBL:
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case SAMPLE_FMT_S64:
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return 8;
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case SAMPLE_FMT_INVALID:
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case SAMPLE_FMT_COUNT:
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break;
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}
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return 0;
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}
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int AudioRenderingParams::bits_per_sample() const
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{
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return bytes_per_sample_per_channel() * 8;
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}
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bool AudioRenderingParams::is_valid() const
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{
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bool valid = (sample_rate() > 0
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&& channel_layout() > 0
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&& format_ != SAMPLE_FMT_INVALID
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&& format_ != SAMPLE_FMT_COUNT);
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if (!valid) {
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qWarning() << "Invalid params found:" << sample_rate() << channel_layout() << format();
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}
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return valid;
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}
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