static int amr_nb_decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint8_t * buf, int buf_size) { AMRContext *s = avctx->priv_data; uint8_t*amrData=buf; int offset=0; UWord8 toc, q, ft; Word16 serial[SERIAL_FRAMESIZE]; /* coded bits */ Word16 *synth; UWord8 *packed_bits; static Word16 packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0}; int i; //printf("amr_decode_frame data_size=%i buf=0x%X buf_size=%d frameCount=%d!!\n",*data_size,buf,buf_size,s->frameCount); synth=data; // while(offset<buf_size) { toc=amrData[offset]; /* read rest of the frame based on ToC byte */ q = (toc >> 2) & 0x01; ft = (toc >> 3) & 0x0F; //printf("offset=%d, packet_size=%d amrData= 0x%X %X %X %X\n",offset,packed_size[ft],amrData[offset],amrData[offset+1],amrData[offset+2],amrData[offset+3]); offset++; packed_bits=amrData+offset; offset+=packed_size[ft]; //Unsort and unpack bits s->rx_type = UnpackBits(q, ft, packed_bits, &s->mode, &serial[1]); //We have a new frame s->frameCount++; if (s->rx_type == RX_NO_DATA) { s->mode = s->speech_decoder_state->prev_mode; } else { s->speech_decoder_state->prev_mode = s->mode; } /* if homed: check if this frame is another homing frame */ if (s->reset_flag_old == 1) { /* only check until end of first subframe */ s->reset_flag = decoder_homing_frame_test_first(&serial[1], s->mode); } /* produce encoder homing frame if homed & input=decoder homing frame */ if ((s->reset_flag != 0) && (s->reset_flag_old != 0)) { for (i = 0; i < L_FRAME; i++) { synth[i] = EHF_MASK; } } else { /* decode frame */ Speech_Decode_Frame(s->speech_decoder_state, s->mode, &serial[1], s->rx_type, synth); } //Each AMR-frame results in 160 16-bit samples *data_size+=160*2; synth+=160; /* if not homed: check whether current frame is a homing frame */ if (s->reset_flag_old == 0) { /* check whole frame */ s->reset_flag = decoder_homing_frame_test(&serial[1], s->mode); } /* reset decoder if current frame is a homing frame */ if (s->reset_flag != 0) { Speech_Decode_Frame_reset(s->speech_decoder_state); } s->reset_flag_old = s->reset_flag; } return offset; }