On 9/20/2021 7:33 PM, Paul B Mahol wrote:
+static int speex_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
+{
+ SpeexContext *s = avctx->priv_data;
+ AVFrame *frame = data;
+ const float scale = 1.f / 32768.f;
+ int buf_size = avpkt->size;
+ float *dst;
+ int ret;
+
+ if (s->pkt_size && avpkt->size == 62)
+ buf_size = s->pkt_size;
+ if ((ret = init_get_bits8(&s->gb, avpkt->data, buf_size)) < 0)
+ return ret;
+
+ frame->nb_samples = s->frame_size * s->frames_per_packet;
+ 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++) {
+ 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->channels == 2)
+ speex_decode_stereo(dst + i * s->frame_size, s->frame_size,
&s->stereo);
+ }
+
+ dst = (float *)frame->extended_data[0];
+ for (int n = 0; n < frame->nb_samples * avctx->channels; n++)
+ dst[n] *= scale;
Does this buffer fulfill the constrains of AVFloatDSPContext's
vector_fmul_scalar()? Alignment wise i know it does because it's an
AVFrame buffer, but the length?
If not, you could maybe FFALIGN frame->nb_samples before the
ff_get_buffer() call, then restore the original value afterwards.
+
+ *got_frame_ptr = 1;
+
+ return buf_size;
+}
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