2 * Copyright (c) Stefano Sabatini | stefasab at gmail.com
3 * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavcodec/avcodec.h"
31 int avfilter_ref_get_channels(AVFilterBufferRef *ref)
33 return ref->audio ? ref->audio->channels : 0;
36 AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples)
38 return ff_get_audio_buffer(link->dst->outputs[0], nb_samples);
41 AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples)
43 AVFrame *frame = av_frame_alloc();
44 int channels = link->channels;
47 av_assert0(channels == av_get_channel_layout_nb_channels(link->channel_layout) || !av_get_channel_layout_nb_channels(link->channel_layout));
52 buf_size = av_samples_get_buffer_size(NULL, channels, nb_samples,
57 frame->buf[0] = av_buffer_alloc(buf_size);
61 frame->nb_samples = nb_samples;
62 ret = avcodec_fill_audio_frame(frame, channels, link->format,
63 frame->buf[0]->data, buf_size, 0);
67 av_samples_set_silence(frame->extended_data, 0, nb_samples, channels,
70 frame->nb_samples = nb_samples;
71 frame->format = link->format;
72 av_frame_set_channels(frame, link->channels);
73 frame->channel_layout = link->channel_layout;
74 frame->sample_rate = link->sample_rate;
79 av_buffer_unref(&frame->buf[0]);
80 av_frame_free(&frame);
84 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
88 if (link->dstpad->get_audio_buffer)
89 ret = link->dstpad->get_audio_buffer(link, nb_samples);
92 ret = ff_default_get_audio_buffer(link, nb_samples);
97 #if FF_API_AVFILTERBUFFER
98 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data,
99 int linesize,int perms,
101 enum AVSampleFormat sample_fmt,
103 uint64_t channel_layout)
106 AVFilterBuffer *samples = av_mallocz(sizeof(*samples));
107 AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref));
109 if (!samples || !samplesref)
112 av_assert0(channels);
113 av_assert0(channel_layout == 0 ||
114 channels == av_get_channel_layout_nb_channels(channel_layout));
116 samplesref->buf = samples;
117 samplesref->buf->free = ff_avfilter_default_free_buffer;
118 if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio))))
121 samplesref->audio->nb_samples = nb_samples;
122 samplesref->audio->channel_layout = channel_layout;
123 samplesref->audio->channels = channels;
125 planes = av_sample_fmt_is_planar(sample_fmt) ? channels : 1;
127 /* make sure the buffer gets read permission or it's useless for output */
128 samplesref->perms = perms | AV_PERM_READ;
130 samples->refcount = 1;
131 samplesref->type = AVMEDIA_TYPE_AUDIO;
132 samplesref->format = sample_fmt;
134 memcpy(samples->data, data,
135 FFMIN(FF_ARRAY_ELEMS(samples->data), planes)*sizeof(samples->data[0]));
136 memcpy(samplesref->data, samples->data, sizeof(samples->data));
138 samples->linesize[0] = samplesref->linesize[0] = linesize;
140 if (planes > FF_ARRAY_ELEMS(samples->data)) {
141 samples-> extended_data = av_mallocz(sizeof(*samples->extended_data) *
143 samplesref->extended_data = av_mallocz(sizeof(*samplesref->extended_data) *
146 if (!samples->extended_data || !samplesref->extended_data)
149 memcpy(samples-> extended_data, data, sizeof(*data)*planes);
150 memcpy(samplesref->extended_data, data, sizeof(*data)*planes);
152 samples->extended_data = samples->data;
153 samplesref->extended_data = samplesref->data;
156 samplesref->pts = AV_NOPTS_VALUE;
161 if (samples && samples->extended_data != samples->data)
162 av_freep(&samples->extended_data);
164 av_freep(&samplesref->audio);
165 if (samplesref->extended_data != samplesref->data)
166 av_freep(&samplesref->extended_data);
168 av_freep(&samplesref);
173 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data,
174 int linesize,int perms,
176 enum AVSampleFormat sample_fmt,
177 uint64_t channel_layout)
179 int channels = av_get_channel_layout_nb_channels(channel_layout);
180 return avfilter_get_audio_buffer_ref_from_arrays_channels(data, linesize, perms,
181 nb_samples, sample_fmt,
182 channels, channel_layout);