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Rename pcm_decode.h to pcm.h since it will hold more than just decoding definitions. Fix some porting errors like idbg should auddbg, etc. Add wav file header and a few low-level wav utilities.

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This commit is contained in:
Gregory Nutt
2014-07-22 15:54:56 -06:00
parent 9f5636ffa1
commit d7a9633dcd
4 changed files with 97 additions and 17 deletions
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audio/pcm_decode.c
+48 -1
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@@ -55,7 +55,7 @@
#include <nuttx/kmalloc.h>
#include <nuttx/audio/audio.h>
#include <nuttx/audio/pcm_decode.h>
#include <nuttx/audio/pcm.h>
#if defined(CONFIG_AUDIO) && defined(CONFIG_AUDIO_FORMAT_PCM)
@@ -99,6 +99,10 @@ struct pcm_decode_s
* Private Function Prototypes
****************************************************************************/
#ifdef CONFIG_PCM_DEBUG
static void pcm_dump(FAR const struct wav_header_s *wav)
#endif
/* struct audio_lowerhalf_s methods *****************************************/
static int pcm_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
@@ -177,6 +181,49 @@ static int pcm_release(FAR struct audio_lowerhalf_s *dev);
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: pcm_dump
*
* Description:
* Dump a WAV file header.
*
****************************************************************************/
#ifdef CONFIG_PCM_DEBUG
static void pcm_dump(FAR const struct wav_header_s *wav)
{
printf( "Wave file header\n");
printf( " Chunk ID: 0x%08x\n", wav->chkid);
printf( " Chunk Size: %u\n", wav->chklen);
printf( " Format: 0x%08x\n", wav->format);
printf( " SubChunk ID: 0x%08x\n", wav->subchkid1);
printf( " Subchunk1 Size: %u\n", wav->subchklen1);
printf( " Audio Format: 0x%04x\n", wav->compression);
printf( " Num. Channels: %d\n", wav->nchannels);
printf( " Sample Rate: %u\n", wav->samprate);
printf( " Byte Rate: %u\n", wav->byterate);
printf( " Block Align: %d\n", wav->align);
printf( " Bits Per Sample: %d\n", wav->bpsamp);
printf( " Subchunk2 ID: 0x%08x\n", wav->subchkid2);
printf( " Subchunk2 Size: %u\n", wav->subchklen2);
}
#endif
/****************************************************************************
* Name: pcm_validwav
*
* Description:
* Return true if this is a valid WAV file header
*
****************************************************************************/
static inline bool pcm_validwav(FAR const struct wav_header_s *wav)
{
return (wav->chkid == WAV_CHUNKID &&
wav->format == WAV_FORMAT &&
wav->subchklen1 == WAV_SUBCHKLEN1);
}
/****************************************************************************
* Name: pcm_getcaps
*