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Improved wave playback

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This commit is contained in:
Andreas Eversberg
2018-01-20 15:51:13 +01:00
parent 3a5fa8837c
commit 9af2b6e007
4 changed files with 25 additions and 18 deletions
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28
src/libwave/wave.c
View File

@@ -166,7 +166,7 @@ error:
return rc;
}
int wave_create_playback(wave_play_t *play, const char *filename, int samplerate, int channels, double max_deviation)
int wave_create_playback(wave_play_t *play, const char *filename, int *samplerate_p, int *channels_p, double max_deviation)
{
uint8_t buffer[256];
struct fmt fmt;
@@ -176,7 +176,6 @@ int wave_create_playback(wave_play_t *play, const char *filename, int samplerate
memset(&fmt, 0, sizeof(fmt));
memset(play, 0, sizeof(*play));
play->channels = channels;
play->max_deviation = max_deviation;
play->fp = fopen(filename, "r");
@@ -266,23 +265,27 @@ int wave_create_playback(wave_play_t *play, const char *filename, int samplerate
rc = -EINVAL;
goto error;
}
if (fmt.channels !=channels) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: We expect %d cannel(s), but wave file only has %d channel(s)\n", channels, fmt.channels);
if (*channels_p == 0)
*channels_p = fmt.channels;
if (fmt.channels != *channels_p) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: We expect %d cannel(s), but wave file only has %d channel(s)\n", *channels_p, fmt.channels);
rc = -EINVAL;
goto error;
}
if ((int)fmt.sample_rate != samplerate) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: The WAVE file's sample rate (%d) does not match our sample rate (%d)!\n", fmt.sample_rate, samplerate);
if (*samplerate_p == 0)
*samplerate_p = fmt.sample_rate;
if ((int)fmt.sample_rate != *samplerate_p) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: The WAVE file's sample rate (%d) does not match our sample rate (%d)!\n", fmt.sample_rate, *samplerate_p);
rc = -EINVAL;
goto error;
}
if ((int)fmt.data_rate != 2 * channels * samplerate) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: The WAVE file's data rate is only %d bytes per second, but we expect %d bytes per second (2 bytes per sample * channels * samplerate)!\n", fmt.data_rate, 2 * channels * samplerate);
if ((int)fmt.data_rate != 2 * *channels_p * *samplerate_p) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: The WAVE file's data rate is only %d bytes per second, but we expect %d bytes per second (2 bytes per sample * channels * samplerate)!\n", fmt.data_rate, 2 * *channels_p * *samplerate_p);
rc = -EINVAL;
goto error;
}
if (fmt.bytes_sample != 2 * channels) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: The WAVE file's bytes per sample is only %d, but we expect %d bytes sample (2 bytes per sample * channels)!\n", fmt.bytes_sample, 2 * channels);
if (fmt.bytes_sample != 2 * *channels_p) {
PDEBUG(DWAVE, DEBUG_ERROR, "WAVE error: The WAVE file's bytes per sample is only %d, but we expect %d bytes sample (2 bytes per sample * channels)!\n", fmt.bytes_sample, 2 * *channels_p);
rc = -EINVAL;
goto error;
}
@@ -292,9 +295,10 @@ int wave_create_playback(wave_play_t *play, const char *filename, int samplerate
goto error;
}
play->left = chunk / 2 / channels;
play->channels = *channels_p;
play->left = chunk / 2 / *channels_p;
play->buffer_size = samplerate * 2 * channels;
play->buffer_size = *samplerate_p * 2 * *channels_p;
play->buffer = calloc(play->buffer_size, 1);
if (!play->buffer) {
PDEBUG(DWAVE, DEBUG_ERROR, "No mem!\n");

2
src/libwave/wave.h
View File

@@ -29,7 +29,7 @@ typedef struct wave_play {
} wave_play_t;
int wave_create_record(wave_rec_t *rec, const char *filename, int samplerate, int channels, double max_deviation);
int wave_create_playback(wave_play_t *play, const char *filename, int samplerate, int channels, double max_deviation);
int wave_create_playback(wave_play_t *play, const char *filename, int *samplerate_p, int *channels_p, double max_deviation);
int wave_read(wave_play_t *play, sample_t **samples, int length);
int wave_write(wave_rec_t *rec, sample_t **samples, int length);
void wave_destroy_record(wave_rec_t *rec);