static int decode_subpacket(COOKContext *q, const uint8_t *inbuffer,
int sub_packet_size, int16_t *outbuffer) {
/* packet dump */
// for (i=0 ; i<sub_packet_size ; i++) {
// av_log(NULL, AV_LOG_ERROR, "%02x", inbuffer[i]);
// }
// av_log(NULL, AV_LOG_ERROR, "\n");
decode_bytes_and_gain(q, inbuffer, &q->gains1);
if (q->joint_stereo) {
joint_decode(q, q->decode_buffer_1, q->decode_buffer_2);
} else {
mono_decode(q, q->decode_buffer_1);
if (q->nb_channels == 2) {
decode_bytes_and_gain(q, inbuffer + sub_packet_size/2, &q->gains2);
mono_decode(q, q->decode_buffer_2);
}
}
mlt_compensate_output(q, q->decode_buffer_1, &q->gains1,
q->mono_previous_buffer1, outbuffer, 0);
if (q->nb_channels == 2) {
if (q->joint_stereo) {
mlt_compensate_output(q, q->decode_buffer_2, &q->gains1,
q->mono_previous_buffer2, outbuffer, 1);
} else {
mlt_compensate_output(q, q->decode_buffer_2, &q->gains2,
q->mono_previous_buffer2, outbuffer, 1);
}
}
return q->samples_per_frame * sizeof(int16_t);
}
/**
* Cook subpacket decoding. This function returns one decoded subpacket,
* usually 1024 samples per channel.
*
* @param q pointer to the COOKContext
* @param inbuffer pointer to the inbuffer
* @param outbuffer pointer to the outbuffer
*/
static void decode_subpacket(COOKContext *q, COOKSubpacket* p, const uint8_t *inbuffer, int16_t *outbuffer) {
int sub_packet_size = p->size;
/* packet dump */
// for (i=0 ; i<sub_packet_size ; i++) {
// av_log(q->avctx, AV_LOG_ERROR, "%02x", inbuffer[i]);
// }
// av_log(q->avctx, AV_LOG_ERROR, "\n");
memset(q->decode_buffer_1,0,sizeof(q->decode_buffer_1));
decode_bytes_and_gain(q, p, inbuffer, &p->gains1);
if (p->joint_stereo) {
joint_decode(q, p, q->decode_buffer_1, q->decode_buffer_2);
} else {
mono_decode(q, p, q->decode_buffer_1);
if (p->num_channels == 2) {
decode_bytes_and_gain(q, p, inbuffer + sub_packet_size/2, &p->gains2);
mono_decode(q, p, q->decode_buffer_2);
}
}
mlt_compensate_output(q, q->decode_buffer_1, &p->gains1,
p->mono_previous_buffer1, outbuffer, p->ch_idx);
if (p->num_channels == 2) {
if (p->joint_stereo) {
mlt_compensate_output(q, q->decode_buffer_2, &p->gains1,
p->mono_previous_buffer2, outbuffer, p->ch_idx + 1);
} else {
mlt_compensate_output(q, q->decode_buffer_2, &p->gains2,
p->mono_previous_buffer2, outbuffer, p->ch_idx + 1);
}
}
}
/**
* Cook subpacket decoding. This function returns one decoded subpacket,
* usually 1024 samples per channel.
*
* @param q pointer to the COOKContext
* @param inbuffer pointer to the inbuffer
* @param outbuffer pointer to the outbuffer
*/
static int decode_subpacket(COOKContext *q, COOKSubpacket *p,
const uint8_t *inbuffer, float **outbuffer)
{
int sub_packet_size = p->size;
int res;
memset(q->decode_buffer_1, 0, sizeof(q->decode_buffer_1));
decode_bytes_and_gain(q, p, inbuffer, &p->gains1);
if (p->joint_stereo) {
if ((res = joint_decode(q, p, q->decode_buffer_1, q->decode_buffer_2)) < 0)
return res;
} else {
if ((res = mono_decode(q, p, q->decode_buffer_1)) < 0)
return res;
if (p->num_channels == 2) {
decode_bytes_and_gain(q, p, inbuffer + sub_packet_size / 2, &p->gains2);
if ((res = mono_decode(q, p, q->decode_buffer_2)) < 0)
return res;
}
}
mlt_compensate_output(q, q->decode_buffer_1, &p->gains1,
p->mono_previous_buffer1,
outbuffer ? outbuffer[p->ch_idx] : NULL);
if (p->num_channels == 2) {
if (p->joint_stereo)
mlt_compensate_output(q, q->decode_buffer_2, &p->gains1,
p->mono_previous_buffer2,
outbuffer ? outbuffer[p->ch_idx + 1] : NULL);
else
mlt_compensate_output(q, q->decode_buffer_2, &p->gains2,
p->mono_previous_buffer2,
outbuffer ? outbuffer[p->ch_idx + 1] : NULL);
}
return 0;
}
/**
* function for decoding joint stereo data
*
* @param q pointer to the COOKContext
* @param mlt_buffer1 pointer to left channel mlt coefficients
* @param mlt_buffer2 pointer to right channel mlt coefficients
*/
static int joint_decode(COOKContext *q, COOKSubpacket *p,
float *mlt_buffer_left, float *mlt_buffer_right)
{
int i, j, res;
int decouple_tab[SUBBAND_SIZE] = { 0 };
float *decode_buffer = q->decode_buffer_0;
int idx, cpl_tmp;
float f1, f2;
const float *cplscale;
memset(decode_buffer, 0, sizeof(q->decode_buffer_0));
/* Make sure the buffers are zeroed out. */
memset(mlt_buffer_left, 0, 1024 * sizeof(*mlt_buffer_left));
memset(mlt_buffer_right, 0, 1024 * sizeof(*mlt_buffer_right));
if ((res = decouple_info(q, p, decouple_tab)) < 0)
return res;
if ((res = mono_decode(q, p, decode_buffer)) < 0)
return res;
/* The two channels are stored interleaved in decode_buffer. */
for (i = 0; i < p->js_subband_start; i++) {
for (j = 0; j < SUBBAND_SIZE; j++) {
mlt_buffer_left[i * 20 + j] = decode_buffer[i * 40 + j];
mlt_buffer_right[i * 20 + j] = decode_buffer[i * 40 + 20 + j];
}
}
/* When we reach js_subband_start (the higher frequencies)
the coefficients are stored in a coupling scheme. */
idx = (1 << p->js_vlc_bits) - 1;
for (i = p->js_subband_start; i < p->subbands; i++) {
cpl_tmp = cplband[i];
idx -= decouple_tab[cpl_tmp];
cplscale = q->cplscales[p->js_vlc_bits - 2]; // choose decoupler table
f1 = cplscale[decouple_tab[cpl_tmp] + 1];
f2 = cplscale[idx];
q->decouple(q, p, i, f1, f2, decode_buffer,
mlt_buffer_left, mlt_buffer_right);
idx = (1 << p->js_vlc_bits) - 1;
}
return 0;
}
static void joint_decode(COOKContext *q, float* mlt_buffer1,
float* mlt_buffer2) {
int i,j;
int decouple_tab[SUBBAND_SIZE];
float decode_buffer[1060];
int idx, cpl_tmp,tmp_idx;
float f1,f2;
float* cplscale;
memset(decouple_tab, 0, sizeof(decouple_tab));
memset(decode_buffer, 0, sizeof(decode_buffer));
/* Make sure the buffers are zeroed out. */
memset(mlt_buffer1,0, 1024*sizeof(float));
memset(mlt_buffer2,0, 1024*sizeof(float));
decouple_info(q, decouple_tab);
mono_decode(q, decode_buffer);
/* The two channels are stored interleaved in decode_buffer. */
for (i=0 ; i<q->js_subband_start ; i++) {
for (j=0 ; j<SUBBAND_SIZE ; j++) {
mlt_buffer1[i*20+j] = decode_buffer[i*40+j];
mlt_buffer2[i*20+j] = decode_buffer[i*40+20+j];
}
}
/* When we reach js_subband_start (the higher frequencies)
the coefficients are stored in a coupling scheme. */
idx = (1 << q->js_vlc_bits) - 1;
for (i=q->js_subband_start ; i<q->subbands ; i++) {
cpl_tmp = cplband[i];
idx -=decouple_tab[cpl_tmp];
cplscale = (float*)cplscales[q->js_vlc_bits-2]; //choose decoupler table
f1 = cplscale[decouple_tab[cpl_tmp]];
f2 = cplscale[idx-1];
for (j=0 ; j<SUBBAND_SIZE ; j++) {
tmp_idx = ((q->js_subband_start + i)*20)+j;
mlt_buffer1[20*i + j] = f1 * decode_buffer[tmp_idx];
mlt_buffer2[20*i + j] = f2 * decode_buffer[tmp_idx];
}
idx = (1 << q->js_vlc_bits) - 1;
}
}
static int decode_subpacket(COOKContext *q, uint8_t *inbuffer,
int sub_packet_size, int16_t *outbuffer) {
int i,j;
int value;
float* tmp_ptr;
/* packet dump */
// for (i=0 ; i<sub_packet_size ; i++) {
// av_log(NULL, AV_LOG_ERROR, "%02x", inbuffer[i]);
// }
// av_log(NULL, AV_LOG_ERROR, "\n");
decode_bytes(inbuffer, q->decoded_bytes_buffer, sub_packet_size);
init_get_bits(&q->gb, q->decoded_bytes_buffer, sub_packet_size*8);
decode_gain_info(&q->gb, &q->gain_current);
if(q->nb_channels==2 && q->joint_stereo==1){
joint_decode(q, q->decode_buf_ptr[0], q->decode_buf_ptr[2]);
/* Swap buffer pointers. */
tmp_ptr = q->decode_buf_ptr[1];
q->decode_buf_ptr[1] = q->decode_buf_ptr[0];
q->decode_buf_ptr[0] = tmp_ptr;
tmp_ptr = q->decode_buf_ptr[3];
q->decode_buf_ptr[3] = q->decode_buf_ptr[2];
q->decode_buf_ptr[2] = tmp_ptr;
/* FIXME: Rethink the gainbuffer handling, maybe a rename?
now/previous swap */
q->gain_now_ptr = &q->gain_now;
q->gain_previous_ptr = &q->gain_previous;
for (i=0 ; i<q->nb_channels ; i++){
cook_imlt(q, q->decode_buf_ptr[i*2], q->mono_mdct_output, q->mlt_tmp);
gain_compensate(q, q->mono_mdct_output, q->gain_now_ptr,
q->gain_previous_ptr, q->previous_buffer_ptr[0]);
/* Swap out the previous buffer. */
tmp_ptr = q->previous_buffer_ptr[0];
q->previous_buffer_ptr[0] = q->previous_buffer_ptr[1];
q->previous_buffer_ptr[1] = tmp_ptr;
/* Clip and convert the floats to 16 bits. */
for (j=0 ; j<q->samples_per_frame ; j++){
value = lrintf(q->mono_mdct_output[j]);
if(value < -32768) value = -32768;
else if(value > 32767) value = 32767;
outbuffer[2*j+i] = value;
}
}
memcpy(&q->gain_now, &q->gain_previous, sizeof(COOKgain));
memcpy(&q->gain_previous, &q->gain_current, sizeof(COOKgain));
} else if (q->nb_channels==2 && q->joint_stereo==0) {
/* channel 0 */
mono_decode(q, q->decode_buf_ptr2[0]);
tmp_ptr = q->decode_buf_ptr2[0];
q->decode_buf_ptr2[0] = q->decode_buf_ptr2[1];
q->decode_buf_ptr2[1] = tmp_ptr;
memcpy(&q->gain_channel1[0], &q->gain_current ,sizeof(COOKgain));
q->gain_now_ptr = &q->gain_channel1[0];
q->gain_previous_ptr = &q->gain_channel1[1];
cook_imlt(q, q->decode_buf_ptr2[0], q->mono_mdct_output,q->mlt_tmp);
gain_compensate(q, q->mono_mdct_output, q->gain_now_ptr,
q->gain_previous_ptr, q->mono_previous_buffer1);
memcpy(&q->gain_channel1[1], &q->gain_channel1[0],sizeof(COOKgain));
for (j=0 ; j<q->samples_per_frame ; j++){
value = lrintf(q->mono_mdct_output[j]);
if(value < -32768) value = -32768;
else if(value > 32767) value = 32767;
outbuffer[2*j+1] = value;
}
/* channel 1 */
//av_log(NULL,AV_LOG_ERROR,"bits = %d\n",get_bits_count(&q->gb));
init_get_bits(&q->gb, q->decoded_bytes_buffer, sub_packet_size*8+q->bits_per_subpacket);
q->gain_now_ptr = &q->gain_channel2[0];
q->gain_previous_ptr = &q->gain_channel2[1];
decode_gain_info(&q->gb, &q->gain_channel2[0]);
mono_decode(q, q->decode_buf_ptr[0]);
tmp_ptr = q->decode_buf_ptr[0];
q->decode_buf_ptr[0] = q->decode_buf_ptr[1];
q->decode_buf_ptr[1] = tmp_ptr;
cook_imlt(q, q->decode_buf_ptr[0], q->mono_mdct_output,q->mlt_tmp);
gain_compensate(q, q->mono_mdct_output, q->gain_now_ptr,
q->gain_previous_ptr, q->mono_previous_buffer2);
/* Swap out the previous buffer. */
tmp_ptr = q->previous_buffer_ptr[0];
q->previous_buffer_ptr[0] = q->previous_buffer_ptr[1];
q->previous_buffer_ptr[1] = tmp_ptr;
memcpy(&q->gain_channel2[1], &q->gain_channel2[0] ,sizeof(COOKgain));
for (j=0 ; j<q->samples_per_frame ; j++){
value = lrintf(q->mono_mdct_output[j]);
if(value < -32768) value = -32768;
else if(value > 32767) value = 32767;
outbuffer[2*j] = value;
}
} else {
mono_decode(q, q->decode_buf_ptr[0]);
/* Swap buffer pointers. */
tmp_ptr = q->decode_buf_ptr[1];
q->decode_buf_ptr[1] = q->decode_buf_ptr[0];
q->decode_buf_ptr[0] = tmp_ptr;
/* FIXME: Rethink the gainbuffer handling, maybe a rename?
now/previous swap */
q->gain_now_ptr = &q->gain_now;
q->gain_previous_ptr = &q->gain_previous;
cook_imlt(q, q->decode_buf_ptr[0], q->mono_mdct_output,q->mlt_tmp);
gain_compensate(q, q->mono_mdct_output, q->gain_now_ptr,
q->gain_previous_ptr, q->mono_previous_buffer1);
/* Clip and convert the floats to 16 bits */
for (j=0 ; j<q->samples_per_frame ; j++){
value = lrintf(q->mono_mdct_output[j]);
if(value < -32768) value = -32768;
else if(value > 32767) value = 32767;
outbuffer[j] = value;
}
memcpy(&q->gain_now, &q->gain_previous, sizeof(COOKgain));
memcpy(&q->gain_previous, &q->gain_current, sizeof(COOKgain));
}
return q->samples_per_frame * sizeof(int16_t);
}