32 #define MAX_CHANNELS 8
38 return "audioresample";
69 q[0] = (p[0] + p[1]) >> 1;
70 q[1] = (p[2] + p[3]) >> 1;
71 q[2] = (p[4] + p[5]) >> 1;
72 q[3] = (p[6] + p[7]) >> 1;
78 q[0] = (p[0] + p[1]) >> 1;
95 v = p[0]; q[0] =
v; q[1] =
v;
96 v = p[1]; q[2] =
v; q[3] =
v;
97 v = p[2]; q[4] =
v; q[5] =
v;
98 v = p[3]; q[6] =
v; q[7] =
v;
104 v = p[0]; q[0] =
v; q[1] =
v;
115 for (i = 0; i <
samples; i++) {
116 for (j = 0; j < channels; j++) {
117 *output[j]++ = *input++;
126 for (i = 0; i <
samples; i++) {
127 for (j = 0; j < channels; j++) {
128 *output++ = *input[j]++;
133 static void ac3_5p1_mux(
short *output,
short *input1,
short *input2,
int n)
138 for (i = 0; i < n; i++) {
142 *output++ = (l / 2) + (r / 2);
151 int output_rate,
int input_rate,
155 int linear,
double cutoff)
161 "Resampling with input channels greater than %d is unsupported.\n",
165 if (output_channels != input_channels &&
166 (input_channels > 2 ||
167 output_channels > 2 &&
168 !(output_channels == 6 && input_channels == 2))) {
170 "Resampling output channel count must be 1 or 2 for mono input; 1, 2 or 6 for stereo input; or N for N channel input.\n");
180 s->
ratio = (float)output_rate / (
float)input_rate;
198 "Cannot convert %s sample format to s16 sample format\n",
209 "Cannot convert s16 sample format to %s sample format\n",
218 filter_length, log2_phase_count,
234 short *output_bak =
NULL;
239 memcpy(output, input, nb_samples * s->
input_channels *
sizeof(
short));
245 int ostride[1] = { 2 };
246 const void *ibuf[1] = { input };
265 "Audio sample format conversion failed\n");
272 lenout = 4 * nb_samples * s->
ratio + 16;
293 memcpy(bufin[i], s->
temp[i], s->
temp_len *
sizeof(
short));
294 buftmp2[i] = bufin[i] + s->
temp_len;
295 bufout[i] =
av_malloc(lenout *
sizeof(
short));
302 buftmp3[0] = bufout[0];
303 memcpy(buftmp2[0], input, nb_samples *
sizeof(
short));
306 buftmp3[i] = bufout[i];
311 memcpy(buftmp2[0], input, nb_samples *
sizeof(
short));
323 &consumed, nb_samples, lenout, is_last);
324 s->
temp_len = nb_samples - consumed;
326 memcpy(s->
temp[i], bufin[i] + consumed, s->
temp_len *
sizeof(
short));
332 ac3_5p1_mux(output, buftmp3[0], buftmp3[1], nb_samples1);
338 int istride[1] = { 2 };
340 const void *ibuf[1] = { output };
341 void *obuf[1] = { output_bak };
346 "Audio sample format convertion failed\n");