As we are using 32 bits data in internal buffer, we need 24bit<==>32bit volume scaler for host<==>processing<==>dai converting.

Signed-off-by: Keyon Jie yang.jie@linux.intel.com --- src/audio/volume.c | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/audio/volume.c b/src/audio/volume.c index d457632..e2badb8 100644 --- a/src/audio/volume.c +++ b/src/audio/volume.c @@ -191,6 +191,44 @@ static void vol_s24_to_s16(struct comp_dev *dev, struct comp_buffer *sink, sink->w_ptr = dest + i; }

+/* copy and scale volume from 32 bit source buffer to 24 bit on 32 bit boundary dest buffer */ +static void vol_s32_to_s24(struct comp_dev *dev, struct comp_buffer *sink, + struct comp_buffer *source, uint32_t frames) +{ + struct comp_data *cd = comp_get_drvdata(dev); + int32_t *src = (int32_t*) source->r_ptr; + int32_t i, *dest = (int32_t*) sink->w_ptr; + + /* buffer sizes are always divisible by period frames */ + for (i = 0; i < frames * 2; i += 2) { + dest[i] = ((int64_t)src[i] * cd->volume[0]) >> 24; + dest[i + 1] = ((int64_t)src[i + 1] * cd->volume[1]) >> 24; + } + + source->r_ptr = src + i; + sink->w_ptr = dest + i; +} + +/* copy and scale volume from 16 bit source buffer to 24 bit on 32 bit boundary dest buffer */ +static void vol_s24_to_s32(struct comp_dev *dev, struct comp_buffer *sink, + struct comp_buffer *source, uint32_t frames) +{ + struct comp_data *cd = comp_get_drvdata(dev); + int32_t i, *src = (int32_t*) source->r_ptr; + int32_t *dest = (int32_t*) sink->w_ptr; + + /* buffer sizes are always divisible by period frames */ + for (i = 0; i < frames * 2; i += 2) { + dest[i] = (int32_t)(((int64_t)src[i] * + cd->volume[0]) >> 8); + dest[i + 1] = (int32_t)(((int64_t)src[i + 1] * + cd->volume[1]) >> 8); + } + + source->r_ptr = src + i; + sink->w_ptr = dest + i; +} + /* map of source and sink buffer formats to volume function */ static const struct comp_func_map func_map[] = { {STREAM_FORMAT_S16_LE, STREAM_FORMAT_S16_LE, 2, vol_s16_to_s16}, @@ -199,6 +237,8 @@ static const struct comp_func_map func_map[] = { {STREAM_FORMAT_S32_LE, STREAM_FORMAT_S32_LE, 2, vol_s32_to_s32}, {STREAM_FORMAT_S16_LE, STREAM_FORMAT_S24_4LE, 2, vol_s16_to_s24}, {STREAM_FORMAT_S24_4LE, STREAM_FORMAT_S16_LE, 2, vol_s24_to_s16}, + {STREAM_FORMAT_S32_LE, STREAM_FORMAT_S24_4LE, 2, vol_s32_to_s24}, + {STREAM_FORMAT_S24_4LE, STREAM_FORMAT_S32_LE, 2, vol_s24_to_s32}, };

static void vol_update(struct comp_data *cd, uint32_t chan) @@ -447,7 +487,7 @@ static int volume_prepare(struct comp_dev *dev) /* TODO tmp hard coded for 24 bit - need fixed for capture*/ /* is sink a host or DAI ? */ if (sink->sink->is_host || sink->sink->is_dai) - sink_format = STREAM_FORMAT_S24_4LE;//sink->params.pcm.format; + sink_format = sink->params.pcm.format; else sink_format = STREAM_FORMAT_S32_LE;