static int g729_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size) { G729ParseContext *s = s1->priv_data; ParseContext *pc = &s->pc; int next; if (!s->block_size) { switch (avctx->codec_id) { case AV_CODEC_ID_G729: /* FIXME: replace this heuristic block_size with more precise estimate */ s->block_size = (avctx->bit_rate < 8000) ? G729D_6K4_BLOCK_SIZE : G729_8K_BLOCK_SIZE; s->duration = avctx->frame_size; break; default: *poutbuf = buf; *poutbuf_size = buf_size; av_log(avctx, AV_LOG_ERROR, "Invalid codec_id\n"); return buf_size; } } if (!s->remaining) s->remaining = s->block_size; if (s->remaining <= buf_size) { next = s->remaining; s->remaining = 0; } else { next = END_NOT_FOUND; s->remaining -= buf_size; } if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) { *poutbuf = NULL; *poutbuf_size = 0; return buf_size; } s1->duration = s->duration; *poutbuf = buf; *poutbuf_size = buf_size; return next; }