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separating saturation codes so that we can support other data formats 

Originally committed as revision 9693 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Marc Hoffman 2007-07-16 01:28:58 +00:00
parent 8c9d2954f7
commit 29b4b8351b
1 changed files with 21 additions and 10 deletions
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31
libavcodec/cook.c
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@ -819,6 +819,26 @@ decode_bytes_and_gain(COOKContext *q, uint8_t *inbuffer,
FFSWAP(int *, gains_ptr->now, gains_ptr->previous);
}
/**
* Saturate the output signal to signed 16bit integers.
*
* @param q pointer to the COOKContext
* @param chan channel to saturate
* @param out pointer to the output vector
*/
static void
saturate_output_float (COOKContext *q, int chan, int16_t *out)
{
int j;
float_t *output = q->mono_mdct_output + q->samples_per_channel;
/* Clip and convert floats to 16 bits.
*/
for (j = 0; j < q->samples_per_channel; j++) {
out[chan + q->nb_channels * j] =
av_clip(lrintf(output[j]), -32768, 32767);
}
}
/**
* Final part of subpacket decoding:
* Apply modulated lapped transform, gain compensation,
@ -837,17 +857,8 @@ mlt_compensate_output(COOKContext *q, float *decode_buffer,
cook_gains *gains, float *previous_buffer,
int16_t *out, int chan)
{
float *output = q->mono_mdct_output + q->samples_per_channel;
int j;
imlt_gain(q, decode_buffer, gains, previous_buffer);
/* Clip and convert floats to 16 bits.
*/
for (j = 0; j < q->samples_per_channel; j++) {
out[chan + q->nb_channels * j] =
av_clip(lrintf(output[j]), -32768, 32767);
}
saturate_output_float (q, chan, out);
}