Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 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 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 | 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); |
||
58 | if (ret < 0) { |
||
59 | av_frame_free(&frame); |
||
60 | return NULL; |
||
61 | } |
||
62 | |||
63 | av_samples_set_silence(frame->extended_data, 0, nb_samples, channels, |
||
64 | link->format); |
||
65 | |||
66 | |||
67 | return frame; |
||
68 | } |
||
69 | |||
70 | AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples) |
||
71 | { |
||
72 | AVFrame *ret = NULL; |
||
73 | |||
74 | if (link->dstpad->get_audio_buffer) |
||
75 | ret = link->dstpad->get_audio_buffer(link, nb_samples); |
||
76 | |||
77 | if (!ret) |
||
78 | ret = ff_default_get_audio_buffer(link, nb_samples); |
||
79 | |||
80 | return ret; |
||
81 | } |
||
82 | |||
83 | #if FF_API_AVFILTERBUFFER |
||
84 | AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data, |
||
85 | int linesize,int perms, |
||
86 | int nb_samples, |
||
87 | enum AVSampleFormat sample_fmt, |
||
88 | int channels, |
||
89 | uint64_t channel_layout) |
||
90 | { |
||
91 | int planes; |
||
92 | AVFilterBuffer *samples = av_mallocz(sizeof(*samples)); |
||
93 | AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref)); |
||
94 | |||
95 | if (!samples || !samplesref) |
||
96 | goto fail; |
||
97 | |||
98 | av_assert0(channels); |
||
99 | av_assert0(channel_layout == 0 || |
||
100 | channels == av_get_channel_layout_nb_channels(channel_layout)); |
||
101 | |||
102 | samplesref->buf = samples; |
||
103 | samplesref->buf->free = ff_avfilter_default_free_buffer; |
||
104 | if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio)))) |
||
105 | goto fail; |
||
106 | |||
107 | samplesref->audio->nb_samples = nb_samples; |
||
108 | samplesref->audio->channel_layout = channel_layout; |
||
109 | samplesref->audio->channels = channels; |
||
110 | |||
111 | planes = av_sample_fmt_is_planar(sample_fmt) ? channels : 1; |
||
112 | |||
113 | /* make sure the buffer gets read permission or it's useless for output */ |
||
114 | samplesref->perms = perms | AV_PERM_READ; |
||
115 | |||
116 | samples->refcount = 1; |
||
117 | samplesref->type = AVMEDIA_TYPE_AUDIO; |
||
118 | samplesref->format = sample_fmt; |
||
119 | |||
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)); |
||
123 | |||
124 | samples->linesize[0] = samplesref->linesize[0] = linesize; |
||
125 | |||
126 | if (planes > FF_ARRAY_ELEMS(samples->data)) { |
||
127 | samples-> extended_data = av_mallocz(sizeof(*samples->extended_data) * |
||
128 | planes); |
||
129 | samplesref->extended_data = av_mallocz(sizeof(*samplesref->extended_data) * |
||
130 | planes); |
||
131 | |||
132 | if (!samples->extended_data || !samplesref->extended_data) |
||
133 | goto fail; |
||
134 | |||
135 | memcpy(samples-> extended_data, data, sizeof(*data)*planes); |
||
136 | memcpy(samplesref->extended_data, data, sizeof(*data)*planes); |
||
137 | } else { |
||
138 | samples->extended_data = samples->data; |
||
139 | samplesref->extended_data = samplesref->data; |
||
140 | } |
||
141 | |||
142 | samplesref->pts = AV_NOPTS_VALUE; |
||
143 | |||
144 | return samplesref; |
||
145 | |||
146 | fail: |
||
147 | if (samples && samples->extended_data != samples->data) |
||
148 | av_freep(&samples->extended_data); |
||
149 | if (samplesref) { |
||
150 | av_freep(&samplesref->audio); |
||
151 | if (samplesref->extended_data != samplesref->data) |
||
152 | av_freep(&samplesref->extended_data); |
||
153 | } |
||
154 | av_freep(&samplesref); |
||
155 | av_freep(&samples); |
||
156 | return NULL; |
||
157 | } |
||
158 | |||
159 | AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data, |
||
160 | int linesize,int perms, |
||
161 | int nb_samples, |
||
162 | enum AVSampleFormat sample_fmt, |
||
163 | uint64_t channel_layout) |
||
164 | { |
||
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); |
||
169 | } |
||
170 | #endif> |