diff options
Diffstat (limited to '')
| -rw-r--r-- | src/pcm_resample_libsamplerate.c | 69 |
1 files changed, 40 insertions, 29 deletions
diff --git a/src/pcm_resample_libsamplerate.c b/src/pcm_resample_libsamplerate.c index fd778acc3..503a049b4 100644 --- a/src/pcm_resample_libsamplerate.c +++ b/src/pcm_resample_libsamplerate.c @@ -62,6 +62,45 @@ out: return convalgo; } +static void +pcm_resample_set(struct pcm_resample_state *state, + uint8_t channels, unsigned src_rate, unsigned dest_rate) +{ + static int convalgo = -1; + int error; + SRC_DATA *data = &state->data; + + if (convalgo < 0) + convalgo = pcm_resample_get_converter(); + + /* (re)set the state/ratio if the in or out format changed */ + if (channels == state->prev.channels && + src_rate == state->prev.src_rate && + dest_rate == state->prev.dest_rate) + return; + + state->error = false; + state->prev.channels = channels; + state->prev.src_rate = src_rate; + state->prev.dest_rate = dest_rate; + + if (state->state) + state->state = src_delete(state->state); + + state->state = src_new(convalgo, channels, &error); + if (!state->state) { + ERROR("cannot create new libsamplerate state: %s\n", + src_strerror(error)); + state->error = true; + return; + } + + data->src_ratio = (double)dest_rate / (double)src_rate; + DEBUG("setting samplerate conversion ratio to %.2lf\n", + data->src_ratio); + src_set_ratio(state->state, data->src_ratio); +} + size_t pcm_resample_16(uint8_t channels, unsigned src_rate, @@ -70,7 +109,6 @@ pcm_resample_16(uint8_t channels, int16_t *dest_buffer, size_t dest_size, struct pcm_resample_state *state) { - static int convalgo = -1; SRC_DATA *data = &state->data; size_t data_in_size; size_t data_out_size; @@ -79,34 +117,7 @@ pcm_resample_16(uint8_t channels, assert((src_size % (sizeof(*src_buffer) * channels)) == 0); assert((dest_size % (sizeof(*dest_buffer) * channels)) == 0); - if (convalgo < 0) - convalgo = pcm_resample_get_converter(); - - /* (re)set the state/ratio if the in or out format changed */ - if (channels != state->prev.channels || - src_rate != state->prev.src_rate || - dest_rate != state->prev.dest_rate) { - state->error = false; - state->prev.channels = channels; - state->prev.src_rate = src_rate; - state->prev.dest_rate = dest_rate; - - if (state->state) - state->state = src_delete(state->state); - - state->state = src_new(convalgo, channels, &error); - if (!state->state) { - ERROR("cannot create new libsamplerate state: %s\n", - src_strerror(error)); - state->error = true; - return 0; - } - - data->src_ratio = (double)dest_rate / (double)src_rate; - DEBUG("setting samplerate conversion ratio to %.2lf\n", - data->src_ratio); - src_set_ratio(state->state, data->src_ratio); - } + pcm_resample_set(state, channels, src_rate, dest_rate); /* there was an error previously, and nothing has changed */ if (state->error) |