39 "fixed",
"float",
"double"
42 #define OFFSET(x) offsetof(VolumeContext, x)
43 #define A AV_OPT_FLAG_AUDIO_PARAM
46 {
"volume",
"Volume adjustment.",
48 {
"precision",
"Mathematical precision.",
130 int nb_samples,
int volume)
133 for (i = 0; i < nb_samples; i++)
134 dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
138 int nb_samples,
int volume)
141 for (i = 0; i < nb_samples; i++)
142 dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
146 int nb_samples,
int volume)
149 int16_t *smp_dst = (int16_t *)dst;
150 const int16_t *smp_src = (
const int16_t *)src;
151 for (i = 0; i < nb_samples; i++)
152 smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
156 int nb_samples,
int volume)
159 int16_t *smp_dst = (int16_t *)dst;
160 const int16_t *smp_src = (
const int16_t *)src;
161 for (i = 0; i < nb_samples; i++)
162 smp_dst[i] = av_clip_int16((smp_src[i] * volume + 128) >> 8);
166 int nb_samples,
int volume)
171 for (i = 0; i < nb_samples; i++)
172 smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
253 int p, plane_samples;
261 for (p = 0; p < vol->
planes; p++) {
267 for (p = 0; p < vol->
planes; p++) {
270 vol->
volume, plane_samples);
273 for (p = 0; p < vol->
planes; p++) {
276 vol->
volume, plane_samples);
312 .priv_class = &volume_class,
314 .
inputs = avfilter_af_volume_inputs,
315 .
outputs = avfilter_af_volume_outputs,