Merge commit '7e350379f87e7f74420b4813170fe808e2313911'
[ffmpeg.git] / libavfilter / audio.c
1 /*
2  * Copyright (c) Stefano Sabatini | stefasab at gmail.com
3  * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavcodec/avcodec.h"
26
27 #include "audio.h"
28 #include "avfilter.h"
29 #include "internal.h"
30
31 int avfilter_ref_get_channels(AVFilterBufferRef *ref)
32 {
33     return ref->audio ? ref->audio->channels : 0;
34 }
35
36 AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples)
37 {
38     return ff_get_audio_buffer(link->dst->outputs[0], nb_samples);
39 }
40
41 AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples)
42 {
43     AVFrame *frame = av_frame_alloc();
44     int channels = link->channels;
45     int buf_size, ret;
46
47     av_assert0(channels == av_get_channel_layout_nb_channels(link->channel_layout) || !av_get_channel_layout_nb_channels(link->channel_layout));
48
49     if (!frame)
50         return NULL;
51
52     buf_size = av_samples_get_buffer_size(NULL, channels, nb_samples,
53                                           link->format, 0);
54     if (buf_size < 0)
55         goto fail;
56
57     frame->buf[0] = av_buffer_alloc(buf_size);
58     if (!frame->buf[0])
59         goto fail;
60
61     frame->nb_samples = nb_samples;
62     ret = avcodec_fill_audio_frame(frame, channels, link->format,
63                                    frame->buf[0]->data, buf_size, 0);
64     if (ret < 0)
65         goto fail;
66
67     av_samples_set_silence(frame->extended_data, 0, nb_samples, channels,
68                            link->format);
69
70     frame->nb_samples     = nb_samples;
71     frame->format         = link->format;
72     frame->channels       = link->channels;
73     frame->channel_layout = link->channel_layout;
74     frame->sample_rate    = link->sample_rate;
75
76     return frame;
77
78 fail:
79     av_buffer_unref(&frame->buf[0]);
80     av_frame_free(&frame);
81     return NULL;
82 }
83
84 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
85 {
86     AVFrame *ret = NULL;
87
88     if (link->dstpad->get_audio_buffer)
89         ret = link->dstpad->get_audio_buffer(link, nb_samples);
90
91     if (!ret)
92         ret = ff_default_get_audio_buffer(link, nb_samples);
93
94     return ret;
95 }
96
97 #if FF_API_AVFILTERBUFFER
98 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data,
99                                                                       int linesize,int perms,
100                                                                       int nb_samples,
101                                                                       enum AVSampleFormat sample_fmt,
102                                                                       int channels,
103                                                                       uint64_t channel_layout)
104 {
105     int planes;
106     AVFilterBuffer    *samples    = av_mallocz(sizeof(*samples));
107     AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref));
108
109     if (!samples || !samplesref)
110         goto fail;
111
112     av_assert0(channels);
113     av_assert0(channel_layout == 0 ||
114                channels == av_get_channel_layout_nb_channels(channel_layout));
115
116     samplesref->buf         = samples;
117     samplesref->buf->free   = ff_avfilter_default_free_buffer;
118     if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio))))
119         goto fail;
120
121     samplesref->audio->nb_samples     = nb_samples;
122     samplesref->audio->channel_layout = channel_layout;
123     samplesref->audio->channels       = channels;
124
125     planes = av_sample_fmt_is_planar(sample_fmt) ? channels : 1;
126
127     /* make sure the buffer gets read permission or it's useless for output */
128     samplesref->perms = perms | AV_PERM_READ;
129
130     samples->refcount  = 1;
131     samplesref->type   = AVMEDIA_TYPE_AUDIO;
132     samplesref->format = sample_fmt;
133
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));
137
138     samples->linesize[0] = samplesref->linesize[0] = linesize;
139
140     if (planes > FF_ARRAY_ELEMS(samples->data)) {
141         samples->   extended_data = av_mallocz(sizeof(*samples->extended_data) *
142                                                planes);
143         samplesref->extended_data = av_mallocz(sizeof(*samplesref->extended_data) *
144                                                planes);
145
146         if (!samples->extended_data || !samplesref->extended_data)
147             goto fail;
148
149         memcpy(samples->   extended_data, data, sizeof(*data)*planes);
150         memcpy(samplesref->extended_data, data, sizeof(*data)*planes);
151     } else {
152         samples->extended_data    = samples->data;
153         samplesref->extended_data = samplesref->data;
154     }
155
156     samplesref->pts = AV_NOPTS_VALUE;
157
158     return samplesref;
159
160 fail:
161     if (samples && samples->extended_data != samples->data)
162         av_freep(&samples->extended_data);
163     if (samplesref) {
164         av_freep(&samplesref->audio);
165         if (samplesref->extended_data != samplesref->data)
166             av_freep(&samplesref->extended_data);
167     }
168     av_freep(&samplesref);
169     av_freep(&samples);
170     return NULL;
171 }
172
173 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data,
174                                                              int linesize,int perms,
175                                                              int nb_samples,
176                                                              enum AVSampleFormat sample_fmt,
177                                                              uint64_t channel_layout)
178 {
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);
183 }
184 #endif