mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
3.3 KiB
98 lines
3.3 KiB
/* |
|
* Copyright (c) Stefano Sabatini | stefasab at gmail.com |
|
* Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "libavutil/avassert.h" |
|
#include "libavutil/channel_layout.h" |
|
#include "libavutil/common.h" |
|
#include "libavutil/cpu.h" |
|
|
|
#include "audio.h" |
|
#include "avfilter.h" |
|
#include "framepool.h" |
|
#include "internal.h" |
|
|
|
AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples) |
|
{ |
|
return ff_get_audio_buffer(link->dst->outputs[0], nb_samples); |
|
} |
|
|
|
AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples) |
|
{ |
|
AVFrame *frame = NULL; |
|
int channels = link->channels; |
|
int channel_layout_nb_channels = av_get_channel_layout_nb_channels(link->channel_layout); |
|
int align = av_cpu_max_align(); |
|
|
|
av_assert0(channels == channel_layout_nb_channels || !channel_layout_nb_channels); |
|
|
|
if (!link->frame_pool) { |
|
link->frame_pool = ff_frame_pool_audio_init(av_buffer_allocz, channels, |
|
nb_samples, link->format, align); |
|
if (!link->frame_pool) |
|
return NULL; |
|
} else { |
|
int pool_channels = 0; |
|
int pool_nb_samples = 0; |
|
int pool_align = 0; |
|
enum AVSampleFormat pool_format = AV_SAMPLE_FMT_NONE; |
|
|
|
if (ff_frame_pool_get_audio_config(link->frame_pool, |
|
&pool_channels, &pool_nb_samples, |
|
&pool_format, &pool_align) < 0) { |
|
return NULL; |
|
} |
|
|
|
if (pool_channels != channels || pool_nb_samples < nb_samples || |
|
pool_format != link->format || pool_align != align) { |
|
|
|
ff_frame_pool_uninit((FFFramePool **)&link->frame_pool); |
|
link->frame_pool = ff_frame_pool_audio_init(av_buffer_allocz, channels, |
|
nb_samples, link->format, align); |
|
if (!link->frame_pool) |
|
return NULL; |
|
} |
|
} |
|
|
|
frame = ff_frame_pool_get(link->frame_pool); |
|
if (!frame) |
|
return NULL; |
|
|
|
frame->nb_samples = nb_samples; |
|
frame->channel_layout = link->channel_layout; |
|
frame->sample_rate = link->sample_rate; |
|
|
|
av_samples_set_silence(frame->extended_data, 0, nb_samples, channels, link->format); |
|
|
|
return frame; |
|
} |
|
|
|
AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples) |
|
{ |
|
AVFrame *ret = NULL; |
|
|
|
if (link->dstpad->get_buffer.audio) |
|
ret = link->dstpad->get_buffer.audio(link, nb_samples); |
|
|
|
if (!ret) |
|
ret = ff_default_get_audio_buffer(link, nb_samples); |
|
|
|
return ret; |
|
}
|
|
|