Lines Matching refs:af
48 void av_audio_fifo_free(AVAudioFifo *af)
50 if (af) {
51 if (af->buf) {
53 for (i = 0; i < af->nb_buffers; i++) {
54 av_fifo_freep2(&af->buf[i]);
56 av_freep(&af->buf);
58 av_free(af);
65 AVAudioFifo *af;
72 af = av_mallocz(sizeof(*af));
73 if (!af)
76 af->channels = channels;
77 af->sample_fmt = sample_fmt;
78 af->sample_size = buf_size / nb_samples;
79 af->nb_buffers = av_sample_fmt_is_planar(sample_fmt) ? channels : 1;
81 af->buf = av_calloc(af->nb_buffers, sizeof(*af->buf));
82 if (!af->buf)
85 for (i = 0; i < af->nb_buffers; i++) {
86 af->buf[i] = av_fifo_alloc2(buf_size, 1, 0);
87 if (!af->buf[i])
90 af->allocated_samples = nb_samples;
92 return af;
95 av_audio_fifo_free(af);
99 int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples)
101 const size_t cur_size = av_fifo_can_read (af->buf[0]) +
102 av_fifo_can_write(af->buf[0]);
105 if ((ret = av_samples_get_buffer_size(&buf_size, af->channels, nb_samples,
106 af->sample_fmt, 1)) < 0)
110 for (i = 0; i < af->nb_buffers; i++) {
111 if ((ret = av_fifo_grow2(af->buf[i], buf_size - cur_size)) < 0)
115 af->allocated_samples = nb_samples;
119 int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
124 if (av_audio_fifo_space(af) < nb_samples) {
125 int current_size = av_audio_fifo_size(af);
130 if ((ret = av_audio_fifo_realloc(af, 2 * (current_size + nb_samples))) < 0)
134 size = nb_samples * af->sample_size;
135 for (i = 0; i < af->nb_buffers; i++) {
136 ret = av_fifo_write(af->buf[i], data[i], size);
140 af->nb_samples += nb_samples;
145 int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
147 return av_audio_fifo_peek_at(af, data, nb_samples, 0);
150 int av_audio_fifo_peek_at(AVAudioFifo *af, void **data, int nb_samples, int offset)
154 if (offset < 0 || offset >= af->nb_samples)
158 nb_samples = FFMIN(nb_samples, af->nb_samples);
161 if (offset > af->nb_samples - nb_samples)
164 offset *= af->sample_size;
165 size = nb_samples * af->sample_size;
166 for (i = 0; i < af->nb_buffers; i++) {
167 if ((ret = av_fifo_peek(af->buf[i], data[i], size, offset)) < 0)
174 int av_audio_fifo_read(AVAudioFifo *af, void **data, int nb_samples)
180 nb_samples = FFMIN(nb_samples, af->nb_samples);
184 size = nb_samples * af->sample_size;
185 for (i = 0; i < af->nb_buffers; i++) {
186 if (av_fifo_read(af->buf[i], data[i], size) < 0)
189 af->nb_samples -= nb_samples;
194 int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
200 nb_samples = FFMIN(nb_samples, af->nb_samples);
203 size = nb_samples * af->sample_size;
204 for (i = 0; i < af->nb_buffers; i++)
205 av_fifo_drain2(af->buf[i], size);
206 af->nb_samples -= nb_samples;
211 void av_audio_fifo_reset(AVAudioFifo *af)
215 for (i = 0; i < af->nb_buffers; i++)
216 av_fifo_reset2(af->buf[i]);
218 af->nb_samples = 0;
221 int av_audio_fifo_size(AVAudioFifo *af)
223 return af->nb_samples;
226 int av_audio_fifo_space(AVAudioFifo *af)
228 return af->allocated_samples - af->nb_samples;