virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-21 10:55:51 +02:00
Code Issues Releases Activity

nellymoserdec: allow user to request SAMPLE_FMT_FLT for output samples.

Browse Source
This commit is contained in:
Justin Ruggles 2011-09-14 12:25:00 -04:00
parent 8b31c086b6
commit 84464b2e7f
1 changed files with 22 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
libavcodec/nellymoserdec.c
View File

@ -137,15 +137,20 @@ static av_cold int decode_init(AVCodecContext * avctx) {
ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);
dsputil_init(&s->dsp, avctx);
ff_fmt_convert_init(&s->fmt_conv, avctx);
if (avctx->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
s->scale_bias = 1.0/(32768*8);
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
} else {
s->scale_bias = 1.0/(1*8);
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
ff_fmt_convert_init(&s->fmt_conv, avctx);
}
/* Generate overlap window */
if (!ff_sine_128[127])
ff_init_ff_sine_windows(7);
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
return 0;
}
@ -157,8 +162,8 @@ static int decode_tag(AVCodecContext * avctx,
int buf_size = avpkt->size;
NellyMoserDecodeContext *s = avctx->priv_data;
int blocks, i, block_size;
int16_t* samples;
samples = (int16_t*)data;
int16_t *samples_s16 = data;
float *samples_flt = data;
if (buf_size < avctx->block_align) {
*data_size = 0;
@ -185,8 +190,15 @@ static int decode_tag(AVCodecContext * avctx,
*/
for (i=0 ; i<blocks ; i++) {
nelly_decode_block(s, &buf[i*NELLY_BLOCK_LEN], s->float_buf);
s->fmt_conv.float_to_int16(&samples[i*NELLY_SAMPLES], s->float_buf, NELLY_SAMPLES);
if (avctx->sample_fmt == SAMPLE_FMT_FLT) {
nelly_decode_block(s, buf, samples_flt);
samples_flt += NELLY_SAMPLES;
} else {
nelly_decode_block(s, buf, s->float_buf);
s->fmt_conv.float_to_int16(samples_s16, s->float_buf, NELLY_SAMPLES);
samples_s16 += NELLY_SAMPLES;
}
buf += NELLY_BLOCK_LEN;
}
*data_size = blocks * block_size;
@ -209,5 +221,8 @@ AVCodec ff_nellymoser_decoder = {
.close = decode_end,
.decode = decode_tag,
.long_name = NULL_IF_CONFIG_SMALL("Nellymoser Asao"),
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE },
};