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Diffstat (limited to 'libavfilter/formats.h')
-rw-r--r-- | libavfilter/formats.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/libavfilter/formats.h b/libavfilter/formats.h new file mode 100644 index 0000000000..7b0eab5dea --- /dev/null +++ b/libavfilter/formats.h @@ -0,0 +1,81 @@ +/* + * 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 + */ + +#ifndef AVFILTER_FORMATS_H +#define AVFILTER_FORMATS_H + +#include "avfilter.h" + +typedef struct AVFilterChannelLayouts { + uint64_t *channel_layouts; ///< list of channel layouts + int nb_channel_layouts; ///< number of channel layouts + + unsigned refcount; ///< number of references to this list + struct AVFilterChannelLayouts ***refs; ///< references to this list +} AVFilterChannelLayouts; + +/** + * Return a channel layouts/samplerates list which contains the intersection of + * the layouts/samplerates of a and b. Also, all the references of a, all the + * references of b, and a and b themselves will be deallocated. + * + * If a and b do not share any common elements, neither is modified, and NULL + * is returned. + */ +AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a, + AVFilterChannelLayouts *b); +AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a, + AVFilterFormats *b); + +/** + * Construct an empty AVFilterChannelLayouts/AVFilterFormats struct -- + * representing any channel layout/sample rate. + */ +AVFilterChannelLayouts *ff_all_channel_layouts(void); +AVFilterFormats *ff_all_samplerates(void); + +AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts); + + +/** + * A helper for query_formats() which sets all links to the same list of channel + * layouts/sample rates. If there are no links hooked to this filter, the list + * is freed. + */ +void ff_set_common_channel_layouts(AVFilterContext *ctx, + AVFilterChannelLayouts *layouts); +void ff_set_common_samplerates(AVFilterContext *ctx, + AVFilterFormats *samplerates); + +int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout); + +/** + * Add *ref as a new reference to f. + */ +void ff_channel_layouts_ref(AVFilterChannelLayouts *f, + AVFilterChannelLayouts **ref); + +/** + * Remove a reference to a channel layouts list. + */ +void ff_channel_layouts_unref(AVFilterChannelLayouts **ref); + +void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, + AVFilterChannelLayouts **newref); + +#endif // AVFILTER_FORMATS_H |