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celtdec: adapt to avcodec_decode_audio4.

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Original fix by Michael Niedermayer.
Slightly modified to avoid the now redundant multiplications
and divisions in the main code path.
This commit is contained in:
Nicolas George 2011-12-03 11:52:48 +01:00
parent a930cd0d19
commit 90bfd511c4
1 changed files with 19 additions and 11 deletions
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30
libavcodec/libcelt_dec.c
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@ -27,7 +27,7 @@
struct libcelt_context {
CELTMode *mode;
CELTDecoder *dec;
int frame_bytes;
AVFrame frame;
int discard;
};
@ -64,7 +64,6 @@ static av_cold int libcelt_dec_init(AVCodecContext *c)
if (!c->channels || !c->frame_size ||
c->frame_size > INT_MAX / sizeof(int16_t) / c->channels)
return AVERROR(EINVAL);
celt->frame_bytes = c->frame_size * c->channels * sizeof(int16_t);
celt->mode = celt_mode_create(c->sample_rate, c->frame_size, &err);
if (!celt->mode)
return ff_celt_error_to_averror(err);
@ -80,7 +79,6 @@ static av_cold int libcelt_dec_init(AVCodecContext *c)
"Invalid overlap (%d), ignored.\n", celt->discard);
celt->discard = 0;
}
celt->discard *= c->channels * sizeof(int16_t);
}
if (c->extradata_size >= 8) {
unsigned version = AV_RL32(c->extradata + 4);
@ -92,6 +90,8 @@ static av_cold int libcelt_dec_init(AVCodecContext *c)
version, lib_version);
}
c->sample_fmt = AV_SAMPLE_FMT_S16;
avcodec_get_frame_defaults(&celt->frame);
c->coded_frame = &celt->frame;
return 0;
}
@ -104,23 +104,31 @@ static av_cold int libcelt_dec_close(AVCodecContext *c)
return 0;
}
static int libcelt_dec_decode(AVCodecContext *c, void *pcm, int *pcm_size,
AVPacket *pkt)
static int libcelt_dec_decode(AVCodecContext *c, void *frame,
int *got_frame_ptr, AVPacket *pkt)
{
struct libcelt_context *celt = c->priv_data;
int err;
int16_t *pcm;
if (*pcm_size < celt->frame_bytes)
return AVERROR(ENOBUFS);
celt->frame.nb_samples = c->frame_size;
err = c->get_buffer(c, &celt->frame);
if (err < 0) {
av_log(c, AV_LOG_ERROR, "get_buffer() failed\n");
return err;
}
pcm = (int16_t *)celt->frame.data[0];
err = celt_decode(celt->dec, pkt->data, pkt->size, pcm, c->frame_size);
if (err < 0)
return ff_celt_error_to_averror(err);
*pcm_size = celt->frame_bytes;
if (celt->discard) {
*pcm_size = celt->frame_bytes - celt->discard;
memmove(pcm, (char *)pcm + celt->discard, *pcm_size);
celt->frame.nb_samples -= celt->discard;
memmove(pcm, pcm + celt->discard * c->channels,
celt->frame.nb_samples * c->channels * sizeof(int16_t));
celt->discard = 0;
}
*got_frame_ptr = 1;
*(AVFrame *)frame = celt->frame;
return pkt->size;
}
@ -132,6 +140,6 @@ AVCodec ff_libcelt_decoder = {
.init = libcelt_dec_init,
.close = libcelt_dec_close,
.decode = libcelt_dec_decode,
.capabilities = 0,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Xiph CELT decoder using libcelt"),
};