aboutsummaryrefslogtreecommitdiffstats
path: root/src/inputPlugins/_flac_common.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/inputPlugins/_flac_common.c')
-rw-r--r--src/inputPlugins/_flac_common.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c
index e0c251489..5a98e63bc 100644
--- a/src/inputPlugins/_flac_common.c
+++ b/src/inputPlugins/_flac_common.c
@@ -196,4 +196,95 @@ void flac_error_common_cb(const char *plugin,
}
}
+/* keep this inlined, this is just macro but prettier :) */
+static inline int flacSendChunk(FlacData * data)
+{
+ if (decoder_data(data->decoder, data->inStream,
+ 1, data->chunk,
+ data->chunk_length, data->time,
+ data->bitRate,
+ data->replayGainInfo) == DECODE_COMMAND_STOP)
+ return -1;
+
+ return 0;
+}
+
+static void flac_convert_stereo16(unsigned char *dest,
+ const FLAC__int32 * const buf[],
+ unsigned int position, unsigned int end)
+{
+ for (; position < end; ++position) {
+ *(uint16_t*)dest = buf[0][position];
+ dest += 2;
+ *(uint16_t*)dest = buf[1][position];
+ dest += 2;
+ }
+}
+
+static void flac_convert(unsigned char *dest,
+ unsigned int num_channels,
+ unsigned int bytes_per_sample,
+ const FLAC__int32 * const buf[],
+ unsigned int position, unsigned int end)
+{
+ unsigned int c_chan, i;
+ FLAC__uint16 u16;
+ unsigned char *uc;
+
+ for (; position < end; ++position) {
+ for (c_chan = 0; c_chan < num_channels; c_chan++) {
+ u16 = buf[c_chan][position];
+ uc = (unsigned char *)&u16;
+ for (i = 0; i < bytes_per_sample; i++) {
+ *dest++ = *uc++;
+ }
+ }
+ }
+}
+
+FLAC__StreamDecoderWriteStatus
+flac_common_write(FlacData *data, const FLAC__Frame * frame,
+ const FLAC__int32 *const buf[])
+{
+ unsigned int c_samp;
+ const unsigned int num_channels = frame->header.channels;
+ const unsigned int bytes_per_sample =
+ audio_format_sample_size(&data->audio_format);
+ const unsigned int bytes_per_channel =
+ bytes_per_sample * frame->header.channels;
+ const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
+ unsigned int num_samples;
+
+ assert(data->audio_format.bits > 0);
+
+ for (c_samp = 0; c_samp < frame->header.blocksize;
+ c_samp += num_samples) {
+ num_samples = frame->header.blocksize - c_samp;
+ if (num_samples > max_samples)
+ num_samples = max_samples;
+
+ if (num_channels == 2 && bytes_per_sample == 2)
+ flac_convert_stereo16(data->chunk,
+ buf, c_samp,
+ c_samp + num_samples);
+ else
+ flac_convert(data->chunk,
+ num_channels, bytes_per_sample, buf,
+ c_samp, c_samp + num_samples);
+ data->chunk_length = num_samples * bytes_per_channel;
+
+ if (flacSendChunk(data) < 0) {
+ return
+ FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+ }
+ data->chunk_length = 0;
+ if (decoder_get_command(data->decoder) == DECODE_COMMAND_SEEK) {
+ return
+ FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+ }
+ }
+
+ return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+}
+
#endif /* HAVE_FLAC || HAVE_OGGFLAC */