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 frame->nb_samples = nb_samples;
53 frame->format = link->format;
54 av_frame_set_channels(frame, link->channels);
55 frame->channel_layout = link->channel_layout;
56 frame->sample_rate = link->sample_rate;
57 ret = av_frame_get_buffer(frame, 0);
59 av_frame_free(&frame);
63 av_samples_set_silence(frame->extended_data, 0, nb_samples, channels,
70 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
74 if (link->dstpad->get_audio_buffer)
75 ret = link->dstpad->get_audio_buffer(link, nb_samples);
78 ret = ff_default_get_audio_buffer(link, nb_samples);
83 #if FF_API_AVFILTERBUFFER
84 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data,
85 int linesize,int perms,
87 enum AVSampleFormat sample_fmt,
89 uint64_t channel_layout)
92 AVFilterBuffer *samples = av_mallocz(sizeof(*samples));
93 AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref));
95 if (!samples || !samplesref)
99 av_assert0(channel_layout == 0 ||
100 channels == av_get_channel_layout_nb_channels(channel_layout));
102 samplesref->buf = samples;
103 samplesref->buf->free = ff_avfilter_default_free_buffer;
104 if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio))))
107 samplesref->audio->nb_samples = nb_samples;
108 samplesref->audio->channel_layout = channel_layout;
109 samplesref->audio->channels = channels;
111 planes = av_sample_fmt_is_planar(sample_fmt) ? channels : 1;
113 /* make sure the buffer gets read permission or it's useless for output */
114 samplesref->perms = perms | AV_PERM_READ;
116 samples->refcount = 1;
117 samplesref->type = AVMEDIA_TYPE_AUDIO;
118 samplesref->format = sample_fmt;
120 memcpy(samples->data, data,
121 FFMIN(FF_ARRAY_ELEMS(samples->data), planes)*sizeof(samples->data[0]));
122 memcpy(samplesref->data, samples->data, sizeof(samples->data));
124 samples->linesize[0] = samplesref->linesize[0] = linesize;
126 if (planes > FF_ARRAY_ELEMS(samples->data)) {
127 samples-> extended_data = av_mallocz_array(sizeof(*samples->extended_data),
129 samplesref->extended_data = av_mallocz_array(sizeof(*samplesref->extended_data),
132 if (!samples->extended_data || !samplesref->extended_data)
135 memcpy(samples-> extended_data, data, sizeof(*data)*planes);
136 memcpy(samplesref->extended_data, data, sizeof(*data)*planes);
138 samples->extended_data = samples->data;
139 samplesref->extended_data = samplesref->data;
142 samplesref->pts = AV_NOPTS_VALUE;
147 if (samples && samples->extended_data != samples->data)
148 av_freep(&samples->extended_data);
150 av_freep(&samplesref->audio);
151 if (samplesref->extended_data != samplesref->data)
152 av_freep(&samplesref->extended_data);
154 av_freep(&samplesref);
159 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data,
160 int linesize,int perms,
162 enum AVSampleFormat sample_fmt,
163 uint64_t channel_layout)
165 int channels = av_get_channel_layout_nb_channels(channel_layout);
166 return avfilter_get_audio_buffer_ref_from_arrays_channels(data, linesize, perms,
167 nb_samples, sample_fmt,
168 channels, channel_layout);