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audio_format: added audio_format_frame_size()

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A frame contains one sample per channel, thus it is sample_size *
channels.  This patch includes some cleanup for various locations
where the sample size for 24 bit audio was still 3 bytes (instead of
4).
This commit is contained in:
Max Kellermann 2008-10-10 14:41:37 +02:00
parent de2cb3f375
commit 96155a3376
5 changed files with 12 additions and 7 deletions
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2
src/audio.c
View File

@ -315,7 +315,7 @@ static int flushAudioBuffer(void)
static size_t audio_buffer_size(const struct audio_format *af)
{
return (af->bits >> 3) * af->channels * (af->sample_rate >> 5);
return audio_format_frame_size(af) * (af->sample_rate >> 5);
}
static void audio_buffer_resize(size_t size)

2
src/audioOutputs/audioOutput_alsa.c
View File

@ -288,7 +288,7 @@ configure_hw:
if (err < 0)
goto error;
ad->sampleSize = audio_format_sample_size(audioFormat) * audioFormat->channels;
ad->sampleSize = audio_format_frame_size(audioFormat);
DEBUG("ALSA device \"%s\" will be playing %i bit, %u channel audio at "
"%u Hz\n", ad->device, audioFormat->bits,

5
src/audioOutputs/audioOutput_osx.c
View File

@ -266,8 +266,7 @@ static int osx_openDevice(struct audio_output *audioOutput,
streamDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
#endif
streamDesc.mBytesPerPacket =
audioFormat->channels * audio_format_sample_size(audioFormat);
streamDesc.mBytesPerPacket = audio_format_frame_size(audioFormat);
streamDesc.mFramesPerPacket = 1;
streamDesc.mBytesPerFrame = streamDesc.mBytesPerPacket;
streamDesc.mChannelsPerFrame = audioFormat->channels;
@ -284,7 +283,7 @@ static int osx_openDevice(struct audio_output *audioOutput,
/* create a buffer of 1s */
od->bufferSize = (audioFormat->sample_rate) *
(audioFormat->bits >> 3) * (audioFormat->channels);
audio_format_frame_size(audioFormat);
od->buffer = xrealloc(od->buffer, od->bufferSize);
od->pos = 0;

8
src/audio_format.h
View File

@ -61,9 +61,15 @@ static inline unsigned audio_format_sample_size(const struct audio_format *af)
return 4;
}
static inline unsigned
audio_format_frame_size(const struct audio_format *af)
{
return audio_format_sample_size(af) * af->channels;
}
static inline double audio_format_time_to_size(const struct audio_format *af)
{
return af->sample_rate * af->channels * audio_format_sample_size(af);
return af->sample_rate * audio_format_frame_size(af);
}
static inline double audioFormatSizeToTime(const struct audio_format *af)

2
src/timer.c
View File

@ -40,7 +40,7 @@ Timer *timer_new(const struct audio_format *af)
timer = xmalloc(sizeof(Timer));
timer->time = 0;
timer->started = 0;
timer->rate = af->sample_rate * (af->bits / CHAR_BIT) * af->channels;
timer->rate = af->sample_rate * audio_format_frame_size(af);
return timer;
}