From af83ac5ec6c29be8b95513ad65dace6cecab617a Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Tue, 26 Aug 2008 08:27:12 +0200 Subject: mp3: dither a whole block at a time Fill the whole output buffer at a time by using dither_buffer()'s ability to decode blocks. Calculate how many samples fit into the output buffer before each invocation. --- src/inputPlugins/mp3_plugin.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'src/inputPlugins/mp3_plugin.c') diff --git a/src/inputPlugins/mp3_plugin.c b/src/inputPlugins/mp3_plugin.c index 2a6346bda..0a99cab21 100644 --- a/src/inputPlugins/mp3_plugin.c +++ b/src/inputPlugins/mp3_plugin.c @@ -932,12 +932,18 @@ static int mp3Read(mp3DecodeData * data, struct decoder *decoder, pcm_length -= data->dropSamplesAtEnd; } - for (; i < pcm_length; i++) { - unsigned int num_samples; + while (i < pcm_length) { + unsigned int num_samples = + (data->outputBufferEnd - data->outputPtr) / + (2 * MAD_NCHANNELS(&(data->frame).header)); + if (num_samples > pcm_length - i) + num_samples = pcm_length - i; + + i += num_samples; num_samples = dither_buffer((mpd_sint16 *) data->outputPtr, &data->synth, &data->dither, - i, i + 1, + i - num_samples, i, MAD_NCHANNELS(&(data->frame).header)); data->outputPtr += 2 * num_samples; -- cgit v1.2.3