| /* |
| * 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 "audio.h" |
| #include "avfilter.h" |
| #include "internal.h" |
| |
| int avfilter_ref_get_channels(AVFilterBufferRef *ref) |
| { |
| return ref->audio ? ref->audio->channels : 0; |
| } |
| |
| AVFilterBufferRef *ff_null_get_audio_buffer(AVFilterLink *link, int perms, |
| int nb_samples) |
| { |
| return ff_get_audio_buffer(link->dst->outputs[0], perms, nb_samples); |
| } |
| |
| AVFilterBufferRef *ff_default_get_audio_buffer(AVFilterLink *link, int perms, |
| int nb_samples) |
| { |
| AVFilterBufferRef *samplesref = NULL; |
| uint8_t **data; |
| int planar = av_sample_fmt_is_planar(link->format); |
| int nb_channels = av_get_channel_layout_nb_channels(link->channel_layout); |
| int planes = planar ? nb_channels : 1; |
| int linesize; |
| int full_perms = AV_PERM_READ | AV_PERM_WRITE | AV_PERM_PRESERVE | |
| AV_PERM_REUSE | AV_PERM_REUSE2 | AV_PERM_ALIGN; |
| |
| av_assert1(!(perms & ~(full_perms | AV_PERM_NEG_LINESIZES))); |
| |
| if (!(data = av_mallocz(sizeof(*data) * planes))) |
| goto fail; |
| |
| if (av_samples_alloc(data, &linesize, nb_channels, nb_samples, link->format, 0) < 0) |
| goto fail; |
| |
| samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels( |
| data, linesize, full_perms, nb_samples, link->format, |
| link->channels, link->channel_layout); |
| if (!samplesref) |
| goto fail; |
| |
| samplesref->audio->sample_rate = link->sample_rate; |
| |
| av_freep(&data); |
| |
| fail: |
| if (data) |
| av_freep(&data[0]); |
| av_freep(&data); |
| return samplesref; |
| } |
| |
| AVFilterBufferRef *ff_get_audio_buffer(AVFilterLink *link, int perms, |
| int nb_samples) |
| { |
| AVFilterBufferRef *ret = NULL; |
| |
| if (link->dstpad->get_audio_buffer) |
| ret = link->dstpad->get_audio_buffer(link, perms, nb_samples); |
| |
| if (!ret) |
| ret = ff_default_get_audio_buffer(link, perms, nb_samples); |
| |
| if (ret) |
| ret->type = AVMEDIA_TYPE_AUDIO; |
| |
| return ret; |
| } |
| |
| AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data, |
| int linesize, |
| int perms, |
| int nb_samples, |
| enum AVSampleFormat sample_fmt, |
| int channels, |
| uint64_t channel_layout) |
| { |
| int planes; |
| AVFilterBuffer *samples = av_mallocz(sizeof(*samples)); |
| AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref)); |
| |
| if (!samples || !samplesref) |
| goto fail; |
| |
| av_assert0(channels); |
| av_assert0(channel_layout == 0 || |
| channels == av_get_channel_layout_nb_channels(channel_layout)); |
| |
| samplesref->buf = samples; |
| samplesref->buf->free = ff_avfilter_default_free_buffer; |
| if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio)))) |
| goto fail; |
| |
| samplesref->audio->nb_samples = nb_samples; |
| samplesref->audio->channel_layout = channel_layout; |
| samplesref->audio->channels = channels; |
| |
| planes = av_sample_fmt_is_planar(sample_fmt) ? channels : 1; |
| |
| /* make sure the buffer gets read permission or it's useless for output */ |
| samplesref->perms = perms | AV_PERM_READ; |
| |
| samples->refcount = 1; |
| samplesref->type = AVMEDIA_TYPE_AUDIO; |
| samplesref->format = sample_fmt; |
| |
| memcpy(samples->data, data, |
| FFMIN(FF_ARRAY_ELEMS(samples->data), planes)*sizeof(samples->data[0])); |
| memcpy(samplesref->data, samples->data, sizeof(samples->data)); |
| |
| samples->linesize[0] = samplesref->linesize[0] = linesize; |
| |
| if (planes > FF_ARRAY_ELEMS(samples->data)) { |
| samples-> extended_data = av_mallocz(sizeof(*samples->extended_data) * |
| planes); |
| samplesref->extended_data = av_mallocz(sizeof(*samplesref->extended_data) * |
| planes); |
| |
| if (!samples->extended_data || !samplesref->extended_data) |
| goto fail; |
| |
| memcpy(samples-> extended_data, data, sizeof(*data)*planes); |
| memcpy(samplesref->extended_data, data, sizeof(*data)*planes); |
| } else { |
| samples->extended_data = samples->data; |
| samplesref->extended_data = samplesref->data; |
| } |
| |
| samplesref->pts = AV_NOPTS_VALUE; |
| |
| return samplesref; |
| |
| fail: |
| if (samples && samples->extended_data != samples->data) |
| av_freep(&samples->extended_data); |
| if (samplesref) { |
| av_freep(&samplesref->audio); |
| if (samplesref->extended_data != samplesref->data) |
| av_freep(&samplesref->extended_data); |
| } |
| av_freep(&samplesref); |
| av_freep(&samples); |
| return NULL; |
| } |
| |
| AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data, |
| int linesize,int perms, |
| int nb_samples, |
| enum AVSampleFormat sample_fmt, |
| uint64_t channel_layout) |
| { |
| int channels = av_get_channel_layout_nb_channels(channel_layout); |
| return avfilter_get_audio_buffer_ref_from_arrays_channels(data, linesize, perms, |
| nb_samples, sample_fmt, |
| channels, channel_layout); |
| } |