diff options
Diffstat (limited to 'libavfilter/formats.h')
| -rw-r--r-- | libavfilter/formats.h | 81 |
1 files changed, 65 insertions, 16 deletions
diff --git a/libavfilter/formats.h b/libavfilter/formats.h index 2e44792f3c..5a8ee5ed2f 100644 --- a/libavfilter/formats.h +++ b/libavfilter/formats.h @@ -1,18 +1,18 @@ /* - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -69,15 +69,46 @@ struct AVFilterFormats { struct AVFilterFormats ***refs; ///< references to this list }; +/** + * A list of supported channel layouts. + * + * The list works the same as AVFilterFormats, except for the following + * differences: + * - A list with all_layouts = 1 means all channel layouts with a known + * disposition; nb_channel_layouts must then be 0. + * - A list with all_counts = 1 means all channel counts, with a known or + * unknown disposition; nb_channel_layouts must then be 0 and all_layouts 1. + * - The list must not contain a layout with a known disposition and a + * channel count with unknown disposition with the same number of channels + * (e.g. AV_CH_LAYOUT_STEREO and FF_COUNT2LAYOUT(2). + */ typedef struct AVFilterChannelLayouts { uint64_t *channel_layouts; ///< list of channel layouts int nb_channel_layouts; ///< number of channel layouts + char all_layouts; ///< accept any known channel layout + char all_counts; ///< accept any channel layout or count unsigned refcount; ///< number of references to this list struct AVFilterChannelLayouts ***refs; ///< references to this list } AVFilterChannelLayouts; /** + * Encode a channel count as a channel layout. + * FF_COUNT2LAYOUT(c) means any channel layout with c channels, with a known + * or unknown disposition. + * The result is only valid inside AVFilterChannelLayouts and immediately + * related functions. + */ +#define FF_COUNT2LAYOUT(c) (0x8000000000000000ULL | (c)) + +/** + * Decode a channel count encoded as a channel layout. + * Return 0 if the channel layout was a real one. + */ +#define FF_LAYOUT2COUNT(l) (((l) & 0x8000000000000000ULL) ? \ + (int)((l) & 0x7FFFFFFF) : 0) + +/** * 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. @@ -92,35 +123,44 @@ AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a, /** * Construct an empty AVFilterChannelLayouts/AVFilterFormats struct -- - * representing any channel layout/sample rate. + * representing any channel layout (with known disposition)/sample rate. */ AVFilterChannelLayouts *ff_all_channel_layouts(void); AVFilterFormats *ff_all_samplerates(void); /** + * Construct an AVFilterChannelLayouts coding for any channel layout, with + * known or unknown disposition. + */ +AVFilterChannelLayouts *ff_all_channel_counts(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_set_common_channel_layouts(AVFilterContext *ctx, + AVFilterChannelLayouts *layouts); +int ff_set_common_samplerates(AVFilterContext *ctx, + AVFilterFormats *samplerates); /** * A helper for query_formats() which sets all links to the same list of * formats. If there are no links hooked to this filter, the list of formats is * freed. */ -void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats); +int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats); 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); +int ff_channel_layouts_ref(AVFilterChannelLayouts *f, + AVFilterChannelLayouts **ref); /** * Remove a reference to a channel layouts list. @@ -132,6 +172,14 @@ void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, int ff_default_query_formats(AVFilterContext *ctx); +/** + * Set the formats list to all existing formats. + * This function behaves like ff_default_query_formats(), except it also + * accepts channel layouts with unknown disposition. It should only be used + * with audio filters. + */ +int ff_query_formats_all(AVFilterContext *ctx); + /** * Create a list of supported formats. This is intended for use in @@ -150,10 +198,10 @@ AVFilterFormats *ff_make_format_list(const int *fmts); * @return a non negative value in case of success, or a negative * value corresponding to an AVERROR code in case of error */ -int ff_add_format(AVFilterFormats **avff, int fmt); +int ff_add_format(AVFilterFormats **avff, int64_t fmt); /** - * Return a list of all formats supported by Libav for the given media type. + * Return a list of all formats supported by FFmpeg for the given media type. */ AVFilterFormats *ff_all_formats(enum AVMediaType type); @@ -170,7 +218,8 @@ AVFilterFormats *ff_planar_sample_fmts(void); * If a and b do not share any common formats, neither is modified, and NULL * is returned. */ -AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b); +AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b, + enum AVMediaType type); /** * Add *ref as a new reference to formats. @@ -184,7 +233,7 @@ AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b); * | |____| | | |____| * |________| |________________________ */ -void ff_formats_ref(AVFilterFormats *formats, AVFilterFormats **ref); +int ff_formats_ref(AVFilterFormats *formats, AVFilterFormats **ref); /** * If *ref is non-NULL, remove *ref as a reference to the format list |