diff options
Diffstat (limited to 'libavfilter/avcodec.c')
-rw-r--r-- | libavfilter/avcodec.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/libavfilter/avcodec.c b/libavfilter/avcodec.c new file mode 100644 index 0000000..e0d9015 --- /dev/null +++ b/libavfilter/avcodec.c @@ -0,0 +1,137 @@ +/* + * Copyright 2011 Stefano Sabatini | stefasab at gmail.com + * + * 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 + */ + +/** + * @file + * libavcodec/libavfilter gluing utilities + */ + +#include "avcodec.h" +#include "libavutil/avassert.h" +#include "libavutil/channel_layout.h" +#include "libavutil/opt.h" + +#if FF_API_AVFILTERBUFFER +AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame, + int perms) +{ + AVFilterBufferRef *picref = + avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms, + frame->width, frame->height, + frame->format); + if (!picref) + return NULL; + if (avfilter_copy_frame_props(picref, frame) < 0) { + picref->buf->data[0] = NULL; + avfilter_unref_bufferp(&picref); + } + return picref; +} + +AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame, + int perms) +{ + AVFilterBufferRef *samplesref; + int channels = av_frame_get_channels(frame); + int64_t layout = av_frame_get_channel_layout(frame); + + if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) { + av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n"); + return NULL; + } + + samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels( + (uint8_t **)frame->extended_data, frame->linesize[0], perms, + frame->nb_samples, frame->format, channels, layout); + if (!samplesref) + return NULL; + if (avfilter_copy_frame_props(samplesref, frame) < 0) { + samplesref->buf->data[0] = NULL; + avfilter_unref_bufferp(&samplesref); + } + return samplesref; +} + +AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type, + const AVFrame *frame, + int perms) +{ + switch (type) { + case AVMEDIA_TYPE_VIDEO: + return avfilter_get_video_buffer_ref_from_frame(frame, perms); + case AVMEDIA_TYPE_AUDIO: + return avfilter_get_audio_buffer_ref_from_frame(frame, perms); + default: + return NULL; + } +} + +int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src) +{ + int planes, nb_channels; + + if (!dst) + return AVERROR(EINVAL); + /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */ + av_assert0(src); + + memcpy(dst->data, src->data, sizeof(dst->data)); + memcpy(dst->linesize, src->linesize, sizeof(dst->linesize)); + + dst->pts = src->pts; + dst->format = src->format; + av_frame_set_pkt_pos(dst, src->pos); + + switch (src->type) { + case AVMEDIA_TYPE_VIDEO: + av_assert0(src->video); + dst->width = src->video->w; + dst->height = src->video->h; + dst->sample_aspect_ratio = src->video->sample_aspect_ratio; + dst->interlaced_frame = src->video->interlaced; + dst->top_field_first = src->video->top_field_first; + dst->key_frame = src->video->key_frame; + dst->pict_type = src->video->pict_type; + break; + case AVMEDIA_TYPE_AUDIO: + av_assert0(src->audio); + nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout); + planes = av_sample_fmt_is_planar(src->format) ? nb_channels : 1; + + if (planes > FF_ARRAY_ELEMS(dst->data)) { + dst->extended_data = av_mallocz_array(planes, sizeof(*dst->extended_data)); + if (!dst->extended_data) + return AVERROR(ENOMEM); + memcpy(dst->extended_data, src->extended_data, + planes * sizeof(*dst->extended_data)); + } else + dst->extended_data = dst->data; + dst->nb_samples = src->audio->nb_samples; + av_frame_set_sample_rate (dst, src->audio->sample_rate); + av_frame_set_channel_layout(dst, src->audio->channel_layout); + av_frame_set_channels (dst, src->audio->channels); + break; + default: + return AVERROR(EINVAL); + } + + return 0; +} +#endif |