static int ra288_decode_frame(AVCodecContext * avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) { AVFrame *frame = data; const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; float *out; int i, ret; RA288Context *ractx = avctx->priv_data; GetBitContext gb; if (buf_size < avctx->block_align) { av_log(avctx, AV_LOG_ERROR, "Error! Input buffer is too small [%d<%d]\n", buf_size, avctx->block_align); return AVERROR_INVALIDDATA; } /* get output buffer */ frame->nb_samples = RA288_BLOCK_SIZE * RA288_BLOCKS_PER_FRAME; if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) return ret; out = (float *)frame->data[0]; init_get_bits8(&gb, buf, avctx->block_align); for (i=0; i < RA288_BLOCKS_PER_FRAME; i++) { float gain = amptable[get_bits(&gb, 3)]; int cb_coef = get_bits(&gb, 6 + (i&1)); decode(ractx, gain, cb_coef); memcpy(out, &ractx->sp_hist[70 + 36], RA288_BLOCK_SIZE * sizeof(*out)); out += RA288_BLOCK_SIZE; if ((i & 7) == 3) { backward_filter(ractx, ractx->sp_hist, ractx->sp_rec, syn_window, ractx->sp_lpc, syn_bw_tab, 36, 40, 35, 70); backward_filter(ractx, ractx->gain_hist, ractx->gain_rec, gain_window, ractx->gain_lpc, gain_bw_tab, 10, 8, 20, 28); } } *got_frame_ptr = 1; return avctx->block_align; }