mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-07 16:40:10 +02:00
171 lines
6.0 KiB
C
171 lines
6.0 KiB
C
/*
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* Copyright (c) Stefano Sabatini | stefasab at gmail.com
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* Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavcodec/avcodec.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "internal.h"
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int avfilter_ref_get_channels(AVFilterBufferRef *ref)
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{
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return ref->audio ? ref->audio->channels : 0;
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}
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AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples)
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{
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return ff_get_audio_buffer(link->dst->outputs[0], nb_samples);
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}
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AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples)
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{
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AVFrame *frame = av_frame_alloc();
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int channels = link->channels;
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int ret;
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av_assert0(channels == av_get_channel_layout_nb_channels(link->channel_layout) || !av_get_channel_layout_nb_channels(link->channel_layout));
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if (!frame)
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return NULL;
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frame->nb_samples = nb_samples;
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frame->format = link->format;
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av_frame_set_channels(frame, link->channels);
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frame->channel_layout = link->channel_layout;
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frame->sample_rate = link->sample_rate;
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ret = av_frame_get_buffer(frame, 0);
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if (ret < 0) {
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av_frame_free(&frame);
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return NULL;
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}
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av_samples_set_silence(frame->extended_data, 0, nb_samples, channels,
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link->format);
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return frame;
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}
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AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
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{
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AVFrame *ret = NULL;
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if (link->dstpad->get_audio_buffer)
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ret = link->dstpad->get_audio_buffer(link, nb_samples);
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if (!ret)
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ret = ff_default_get_audio_buffer(link, nb_samples);
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return ret;
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}
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#if FF_API_AVFILTERBUFFER
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AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data,
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int linesize,int perms,
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int nb_samples,
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enum AVSampleFormat sample_fmt,
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int channels,
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uint64_t channel_layout)
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{
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int planes;
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AVFilterBuffer *samples = av_mallocz(sizeof(*samples));
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AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref));
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if (!samples || !samplesref)
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goto fail;
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av_assert0(channels);
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av_assert0(channel_layout == 0 ||
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channels == av_get_channel_layout_nb_channels(channel_layout));
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samplesref->buf = samples;
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samplesref->buf->free = ff_avfilter_default_free_buffer;
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if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio))))
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goto fail;
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samplesref->audio->nb_samples = nb_samples;
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samplesref->audio->channel_layout = channel_layout;
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samplesref->audio->channels = channels;
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planes = av_sample_fmt_is_planar(sample_fmt) ? channels : 1;
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/* make sure the buffer gets read permission or it's useless for output */
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samplesref->perms = perms | AV_PERM_READ;
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samples->refcount = 1;
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samplesref->type = AVMEDIA_TYPE_AUDIO;
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samplesref->format = sample_fmt;
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memcpy(samples->data, data,
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FFMIN(FF_ARRAY_ELEMS(samples->data), planes)*sizeof(samples->data[0]));
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memcpy(samplesref->data, samples->data, sizeof(samples->data));
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samples->linesize[0] = samplesref->linesize[0] = linesize;
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if (planes > FF_ARRAY_ELEMS(samples->data)) {
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samples-> extended_data = av_mallocz_array(sizeof(*samples->extended_data),
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planes);
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samplesref->extended_data = av_mallocz_array(sizeof(*samplesref->extended_data),
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planes);
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if (!samples->extended_data || !samplesref->extended_data)
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goto fail;
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memcpy(samples-> extended_data, data, sizeof(*data)*planes);
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memcpy(samplesref->extended_data, data, sizeof(*data)*planes);
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} else {
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samples->extended_data = samples->data;
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samplesref->extended_data = samplesref->data;
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}
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samplesref->pts = AV_NOPTS_VALUE;
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return samplesref;
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fail:
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if (samples && samples->extended_data != samples->data)
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av_freep(&samples->extended_data);
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if (samplesref) {
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av_freep(&samplesref->audio);
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if (samplesref->extended_data != samplesref->data)
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av_freep(&samplesref->extended_data);
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}
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av_freep(&samplesref);
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av_freep(&samples);
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return NULL;
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}
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AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data,
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int linesize,int perms,
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int nb_samples,
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enum AVSampleFormat sample_fmt,
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uint64_t channel_layout)
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{
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int channels = av_get_channel_layout_nb_channels(channel_layout);
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return avfilter_get_audio_buffer_ref_from_arrays_channels(data, linesize, perms,
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nb_samples, sample_fmt,
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channels, channel_layout);
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}
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#endif
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