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avcodec/speexdec: improve support for speex in non-ogg

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This commit is contained in:
Paul B Mahol 2022-09-03 18:17:23 +02:00
parent 2f9b8bbd1f
commit b6e8fc1c20
1 changed files with 11 additions and 5 deletions
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16
libavcodec/speexdec.c
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@ -1462,7 +1462,7 @@ static av_cold int speex_decode_init(AVCodecContext *avctx)
default: s->mode = 2;
}
s->frames_per_packet = 1;
s->frames_per_packet = 64;
s->frame_size = NB_FRAME_SIZE << s->mode;
}
@ -1537,6 +1537,7 @@ static int speex_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int *got_frame_ptr, AVPacket *avpkt)
{
SpeexContext *s = avctx->priv_data;
int frames_per_packet = s->frames_per_packet;
const float scale = 1.f / 32768.f;
int buf_size = avpkt->size;
float *dst;
@ -1547,26 +1548,31 @@ static int speex_decode_frame(AVCodecContext *avctx, AVFrame *frame,
if ((ret = init_get_bits8(&s->gb, avpkt->data, buf_size)) < 0)
return ret;
frame->nb_samples = FFALIGN(s->frame_size * s->frames_per_packet, 4);
frame->nb_samples = FFALIGN(s->frame_size * frames_per_packet, 4);
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
dst = (float *)frame->extended_data[0];
for (int i = 0; i < s->frames_per_packet; i++) {
for (int i = 0; i < frames_per_packet; i++) {
ret = speex_modes[s->mode].decode(avctx, &s->st[s->mode], &s->gb, dst + i * s->frame_size);
if (ret < 0)
return ret;
if (avctx->ch_layout.nb_channels == 2)
speex_decode_stereo(dst + i * s->frame_size, s->frame_size, &s->stereo);
if (get_bits_left(&s->gb) < 5 ||
show_bits(&s->gb, 5) == 15) {
frames_per_packet = i + 1;
break;
}
}
dst = (float *)frame->extended_data[0];
s->fdsp->vector_fmul_scalar(dst, dst, scale, frame->nb_samples * frame->ch_layout.nb_channels);
frame->nb_samples = s->frame_size * s->frames_per_packet;
frame->nb_samples = s->frame_size * frames_per_packet;
*got_frame_ptr = 1;
return buf_size;
return (get_bits_count(&s->gb) + 7) >> 3;
}
static av_cold int speex_decode_close(AVCodecContext *avctx)