diff options
Diffstat (limited to 'ffmpeg1/libavfilter/buffer.c')
| -rw-r--r-- | ffmpeg1/libavfilter/buffer.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/ffmpeg1/libavfilter/buffer.c b/ffmpeg1/libavfilter/buffer.c new file mode 100644 index 0000000..29fedc4 --- /dev/null +++ b/ffmpeg1/libavfilter/buffer.c @@ -0,0 +1,167 @@ +/* + * Copyright Stefano Sabatini <stefasab gmail com> + * Copyright Anton Khirnov <anton khirnov net> + * Copyright Michael Niedermayer <michaelni gmx at> + * + * 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/channel_layout.h" +#include "libavutil/avassert.h" +#include "libavutil/common.h" +#include "libavutil/imgutils.h" +#include "libavcodec/avcodec.h" + +#include "avfilter.h" +#include "internal.h" +#include "audio.h" +#include "avcodec.h" + +void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr) +{ + if (ptr->extended_data != ptr->data) + av_freep(&ptr->extended_data); + av_free(ptr->data[0]); + av_free(ptr); +} + +static void copy_video_props(AVFilterBufferRefVideoProps *dst, AVFilterBufferRefVideoProps *src) { + *dst = *src; + if (src->qp_table) { + int qsize = src->qp_table_size; + dst->qp_table = av_malloc(qsize); + memcpy(dst->qp_table, src->qp_table, qsize); + } +} + +AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask) +{ + AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef)); + if (!ret) + return NULL; + *ret = *ref; + + ret->metadata = NULL; + av_dict_copy(&ret->metadata, ref->metadata, 0); + + if (ref->type == AVMEDIA_TYPE_VIDEO) { + ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps)); + if (!ret->video) { + av_free(ret); + return NULL; + } + copy_video_props(ret->video, ref->video); + ret->extended_data = ret->data; + } else if (ref->type == AVMEDIA_TYPE_AUDIO) { + ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps)); + if (!ret->audio) { + av_free(ret); + return NULL; + } + *ret->audio = *ref->audio; + + if (ref->extended_data && ref->extended_data != ref->data) { + int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout); + if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) * + nb_channels))) { + av_freep(&ret->audio); + av_freep(&ret); + return NULL; + } + memcpy(ret->extended_data, ref->extended_data, + sizeof(*ret->extended_data) * nb_channels); + } else + ret->extended_data = ret->data; + } + ret->perms &= pmask; + ret->buf->refcount ++; + return ret; +} + +void avfilter_unref_buffer(AVFilterBufferRef *ref) +{ + if (!ref) + return; + av_assert0(ref->buf->refcount > 0); + if (!(--ref->buf->refcount)) + ref->buf->free(ref->buf); + if (ref->extended_data != ref->data) + av_freep(&ref->extended_data); + if (ref->video) + av_freep(&ref->video->qp_table); + av_freep(&ref->video); + av_freep(&ref->audio); + av_dict_free(&ref->metadata); + av_free(ref); +} + +void avfilter_unref_bufferp(AVFilterBufferRef **ref) +{ + avfilter_unref_buffer(*ref); + *ref = NULL; +} + +int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src) +{ + dst->pts = src->pts; + dst->pos = av_frame_get_pkt_pos(src); + dst->format = src->format; + + av_dict_free(&dst->metadata); + av_dict_copy(&dst->metadata, av_frame_get_metadata(src), 0); + + switch (dst->type) { + case AVMEDIA_TYPE_VIDEO: + dst->video->w = src->width; + dst->video->h = src->height; + dst->video->sample_aspect_ratio = src->sample_aspect_ratio; + dst->video->interlaced = src->interlaced_frame; + dst->video->top_field_first = src->top_field_first; + dst->video->key_frame = src->key_frame; + dst->video->pict_type = src->pict_type; + break; + case AVMEDIA_TYPE_AUDIO: + dst->audio->sample_rate = src->sample_rate; + dst->audio->channel_layout = src->channel_layout; + break; + default: + return AVERROR(EINVAL); + } + + return 0; +} + +void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src) +{ + // copy common properties + dst->pts = src->pts; + dst->pos = src->pos; + + switch (src->type) { + case AVMEDIA_TYPE_VIDEO: { + if (dst->video->qp_table) + av_freep(&dst->video->qp_table); + copy_video_props(dst->video, src->video); + break; + } + case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break; + default: break; + } + + av_dict_free(&dst->metadata); + av_dict_copy(&dst->metadata, src->metadata, 0); +} |