diff options
Diffstat (limited to 'audio_out.c')
-rw-r--r-- | audio_out.c | 229 |
1 files changed, 207 insertions, 22 deletions
diff --git a/audio_out.c b/audio_out.c index 9b814a6..3438f53 100644 --- a/audio_out.c +++ b/audio_out.c @@ -35,6 +35,7 @@ #define EFFECT_UUID_NULL EFFECT_UUID_NULL_OUT #define EFFECT_UUID_NULL_STR EFFECT_UUID_NULL_STR_OUT +#include <audio_utils/resampler.h> #include "audio_hw.h" #include "mixer.h" @@ -77,6 +78,9 @@ int audio_out_pcm_open(struct tinyalsa_audio_stream_out *stream_out) stream_out->pcm = pcm; + if(stream_out->resampler != NULL) + stream_out->resampler->reset(stream_out->resampler); + return 0; } @@ -111,12 +115,151 @@ int audio_out_set_route(struct tinyalsa_audio_stream_out *stream_out, return 0; } +int audio_out_resampler_open(struct tinyalsa_audio_stream_out *stream_out) +{ + int rc; + + if(stream_out == NULL) + return -1; + + rc = create_resampler(stream_out->rate, + stream_out->mixer_props->rate, + popcount(stream_out->channels), + RESAMPLER_QUALITY_DEFAULT, + NULL, + &stream_out->resampler); + if(rc < 0 || stream_out->resampler == NULL) { + LOGE("Failed to create resampler"); + return -1; + } + + return 0; +} + +void audio_out_resampler_close(struct tinyalsa_audio_stream_out *stream_out) +{ + if(stream_out == NULL) + return; + + if(stream_out->resampler != NULL) { + release_resampler(stream_out->resampler); + stream_out->resampler = NULL; + } +} + +int audio_out_write_process(struct tinyalsa_audio_stream_out *stream_out, void *buffer, int size) +{ + size_t frames_out; + + size_t frames_in; + int size_in; + void *buffer_in = NULL; + + int frames_out_resampler; + int size_out_resampler; + void *buffer_out_resampler = NULL; + + int frames_out_channels; + int size_out_channels; + void *buffer_out_channels = NULL; + + int i, j; + int rc; + + if(stream_out == NULL || buffer == NULL || size <= 0) + return -1; + + frames_in = size / audio_stream_frame_size((struct audio_stream *) stream_out); + size_in = size; + buffer_in = buffer; + + if(stream_out->resampler != NULL) { + frames_out_resampler = (frames_in * stream_out->mixer_props->rate) / + stream_out->rate; + frames_out_resampler = ((frames_out_resampler + 15) / 16) * 16; + size_out_resampler = frames_out_resampler * audio_stream_frame_size((struct audio_stream *) stream_out); + buffer_out_resampler = calloc(1, size_out_resampler); + + frames_out = frames_out_resampler; + stream_out->resampler->resample_from_input(stream_out->resampler, + buffer_in, &frames_in, buffer_out_resampler, &frames_out); + + frames_in = frames_out; + size_in = frames_out * audio_stream_frame_size((struct audio_stream *) stream_out); + buffer_in = buffer_out_resampler; + } + + if(buffer_in == NULL) + goto error; + + //FIXME: This is only for PCM 16 + if(popcount(stream_out->mixer_props->channels) < popcount(stream_out->channels)) { + frames_out_channels = frames_in; + size_out_channels = frames_out_channels * popcount(stream_out->mixer_props->channels) * audio_bytes_per_sample(stream_out->mixer_props->format); + buffer_out_channels = calloc(1, size_out_channels); + + int channels_count_in = popcount(stream_out->channels); + int channels_count_out = popcount(stream_out->mixer_props->channels); + int ratio = channels_count_in / channels_count_out; + + int16_t *byte_in = (int16_t *) buffer_in; + int16_t *byte_out = (int16_t *) buffer_out_channels; + int16_t byte; + + for(i=0 ; i < frames_out_channels * channels_count_out; i++) { + byte = 0; + for(j=0 ; j < ratio ; j++) { + byte += *byte_in / ratio; + byte_in++; + } + + *byte_out = byte; + byte_out++; + } + + frames_in = frames_out_channels; + size_in = size_out_channels; + buffer_in = buffer_out_channels; + } else if(popcount(stream_out->channels) != popcount(stream_out->mixer_props->channels)) { + LOGE("Asked for more channels than software can provide!"); + goto error; + } + + if(buffer_in != NULL) { + if(stream_out->pcm == NULL || !pcm_is_ready(stream_out->pcm)) { + LOGE("pcm device is not ready"); + goto error; + } + + rc = pcm_write(stream_out->pcm, buffer_in, size_in); + if(rc != 0) { + LOGE("pcm write failed!"); + goto error; + } + } + + if(buffer_out_resampler != NULL) + free(buffer_out_resampler); + if(buffer_out_channels != NULL) + free(buffer_out_channels); + + return 0; + +error: + if(buffer_out_resampler != NULL) + free(buffer_out_resampler); + if(buffer_out_channels != NULL) + free(buffer_out_channels); + + return -1; +} + static uint32_t audio_out_get_sample_rate(const struct audio_stream *stream) { struct tinyalsa_audio_stream_out *stream_out; if(stream == NULL) - return -1; + return 0; stream_out = (struct tinyalsa_audio_stream_out *) stream; @@ -134,8 +277,16 @@ static int audio_out_set_sample_rate(struct audio_stream *stream, uint32_t rate) stream_out = (struct tinyalsa_audio_stream_out *) stream; - // FIXME: If rate is different, change resampler - stream_out->rate = rate; + if(stream_out->rate != (int) rate) { + stream_out->rate = rate; + + if(stream_out->rate != stream_out->mixer_props->rate) { + audio_out_resampler_close(stream_out); + audio_out_resampler_open(stream_out); + + stream_out->standby = 1; + } + } return 0; } @@ -151,7 +302,7 @@ static size_t audio_out_get_buffer_size(const struct audio_stream *stream) stream_out = (struct tinyalsa_audio_stream_out *) stream; size = (stream_out->mixer_props->period_size * stream_out->rate) / - stream_out->rate; + stream_out->mixer_props->rate; size = ((size + 15) / 16) * 16; size = size * audio_stream_frame_size((struct audio_stream *) stream); @@ -193,8 +344,12 @@ static int audio_out_set_format(struct audio_stream *stream, int format) stream_out = (struct tinyalsa_audio_stream_out *) stream; - // FIXME: If format is different, change resampler - stream_out->format = format; + if(stream_out->format != (audio_format_t) format) { + stream_out->format = format; + + if(stream_out->format != stream_out->mixer_props->format) + stream_out->standby = 1; + } return 0; } @@ -287,9 +442,21 @@ static char *audio_out_get_parameters(const struct audio_stream *stream, const c static uint32_t audio_out_get_latency(const struct audio_stream_out *stream) { + struct tinyalsa_audio_stream_out *stream_out; + uint32_t latency; + LOGD("%s(%p)", __func__, stream); - return 0; + if(stream == NULL) + return -1; + + stream_out = (struct tinyalsa_audio_stream_out *) stream; + + latency = (stream_out->mixer_props->period_size * + stream_out->mixer_props->period_count * 1000) / + stream_out->mixer_props->rate; + + return latency; } static int audio_out_set_volume(struct audio_stream_out *stream, float left, @@ -344,14 +511,9 @@ static ssize_t audio_out_write(struct audio_stream_out *stream, stream_out->standby = 0; } - if(stream_out->pcm == NULL || !pcm_is_ready(stream_out->pcm)) { - LOGE("pcm device is not ready"); - return -1; - } - - rc = pcm_write(stream_out->pcm, (void *) buffer, (int) bytes); - if(rc != 0) { - LOGE("pcm write failed!"); + rc = audio_out_write_process(stream_out, (void *) buffer, (int) bytes); + if(rc < 0) { + LOGE("Process and write failed!"); return -1; } @@ -424,7 +586,7 @@ int audio_hw_open_output_stream(struct audio_hw_device *dev, LOGD("%s(%p, %d, %p, %p, %p, %p)", __func__, dev, devices, format, channels, sample_rate, stream_out); - if(dev == NULL || stream_out == NULL) + if(dev == NULL || format == NULL || channels == NULL || sample_rate == NULL || stream_out == NULL) return -EINVAL; tinyalsa_audio_device = (struct tinyalsa_audio_device *) dev; @@ -463,12 +625,35 @@ int audio_hw_open_output_stream(struct audio_hw_device *dev, if(tinyalsa_audio_stream_out->mixer_props == NULL) goto error_stream; - tinyalsa_audio_stream_out->rate = - tinyalsa_audio_stream_out->mixer_props->rate; - tinyalsa_audio_stream_out->channels = - tinyalsa_audio_stream_out->mixer_props->channels; - tinyalsa_audio_stream_out->format = - tinyalsa_audio_stream_out->mixer_props->format; + // Default values + if(tinyalsa_audio_stream_out->mixer_props->rate == 0) + tinyalsa_audio_stream_out->mixer_props->rate = 44100; + if(tinyalsa_audio_stream_out->mixer_props->channels == 0) + tinyalsa_audio_stream_out->mixer_props->channels = AUDIO_CHANNEL_OUT_STEREO; + if(tinyalsa_audio_stream_out->mixer_props->format == 0) + tinyalsa_audio_stream_out->mixer_props->format = AUDIO_FORMAT_PCM_16_BIT; + + //Default incoming data will always be 44100Hz, stereo, PCM 16 + if(*sample_rate == 0) + tinyalsa_audio_stream_out->rate = 44100; + else + tinyalsa_audio_stream_out->rate = *sample_rate; + if(*channels == 0) + tinyalsa_audio_stream_out->channels = AUDIO_CHANNEL_OUT_STEREO; + else + tinyalsa_audio_stream_out->channels = *channels; + if(*format == 0) + tinyalsa_audio_stream_out->format = AUDIO_FORMAT_PCM_16_BIT; + else + tinyalsa_audio_stream_out->format = *format; + + if(tinyalsa_audio_stream_out->rate != tinyalsa_audio_stream_out->mixer_props->rate) { + rc = audio_out_resampler_open(tinyalsa_audio_stream_out); + if(rc < 0) { + LOGE("Unable to open resampler!"); + goto error_stream; + } + } *sample_rate = (uint32_t) tinyalsa_audio_stream_out->rate; *channels = (uint32_t) tinyalsa_audio_stream_out->channels; |