diff options
Diffstat (limited to 'libavfilter/buffersink.h')
-rw-r--r-- | libavfilter/buffersink.h | 102 |
1 files changed, 97 insertions, 5 deletions
diff --git a/libavfilter/buffersink.h b/libavfilter/buffersink.h index 83a8bd9..24cd2fe 100644 --- a/libavfilter/buffersink.h +++ b/libavfilter/buffersink.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 */ @@ -22,7 +22,7 @@ /** * @file * @ingroup lavfi_buffersink - * memory buffer sink API + * memory buffer sink API for audio and video */ #include "avfilter.h" @@ -35,6 +35,26 @@ #if FF_API_AVFILTERBUFFER /** + * Get an audio/video buffer data from buffer_sink and put it in bufref. + * + * This function works with both audio and video buffer sinks. + * + * @param buffer_sink pointer to a buffersink or abuffersink context + * @param flags a combination of AV_BUFFERSINK_FLAG_* flags + * @return >= 0 in case of success, a negative AVERROR code in case of + * failure + */ +attribute_deprecated +int av_buffersink_get_buffer_ref(AVFilterContext *buffer_sink, + AVFilterBufferRef **bufref, int flags); + +/** + * Get the number of immediately available frames. + */ +attribute_deprecated +int av_buffersink_poll_frame(AVFilterContext *ctx); + +/** * Get a buffer with filtered data from sink and put it in buf. * * @param ctx pointer to a context of a buffersink or abuffersink AVFilter. @@ -73,6 +93,78 @@ int av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf, /** * Get a frame with filtered data from sink and put it in frame. * + * @param ctx pointer to a buffersink or abuffersink filter context. + * @param frame pointer to an allocated frame that will be filled with data. + * The data must be freed using av_frame_unref() / av_frame_free() + * @param flags a combination of AV_BUFFERSINK_FLAG_* flags + * + * @return >= 0 in for success, a negative AVERROR code for failure. + */ +int av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags); + +/** + * Tell av_buffersink_get_buffer_ref() to read video/samples buffer + * reference, but not remove it from the buffer. This is useful if you + * need only to read a video/samples buffer, without to fetch it. + */ +#define AV_BUFFERSINK_FLAG_PEEK 1 + +/** + * Tell av_buffersink_get_buffer_ref() not to request a frame from its input. + * If a frame is already buffered, it is read (and removed from the buffer), + * but if no frame is present, return AVERROR(EAGAIN). + */ +#define AV_BUFFERSINK_FLAG_NO_REQUEST 2 + +/** + * Struct to use for initializing a buffersink context. + */ +typedef struct { + const enum AVPixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by AV_PIX_FMT_NONE +} AVBufferSinkParams; + +/** + * Create an AVBufferSinkParams structure. + * + * Must be freed with av_free(). + */ +AVBufferSinkParams *av_buffersink_params_alloc(void); + +/** + * Struct to use for initializing an abuffersink context. + */ +typedef struct { + const enum AVSampleFormat *sample_fmts; ///< list of allowed sample formats, terminated by AV_SAMPLE_FMT_NONE + const int64_t *channel_layouts; ///< list of allowed channel layouts, terminated by -1 + const int *channel_counts; ///< list of allowed channel counts, terminated by -1 + int all_channel_counts; ///< if not 0, accept any channel count or layout + int *sample_rates; ///< list of allowed sample rates, terminated by -1 +} AVABufferSinkParams; + +/** + * Create an AVABufferSinkParams structure. + * + * Must be freed with av_free(). + */ +AVABufferSinkParams *av_abuffersink_params_alloc(void); + +/** + * Set the frame size for an audio buffer sink. + * + * All calls to av_buffersink_get_buffer_ref will return a buffer with + * exactly the specified number of samples, or AVERROR(EAGAIN) if there is + * not enough. The last buffer at EOF will be padded with 0. + */ +void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size); + +/** + * Get the frame rate of the input. + */ +AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx); + +/** + * Get a frame with filtered data from sink and put it in frame. + * * @param ctx pointer to a context of a buffersink or abuffersink AVFilter. * @param frame pointer to an allocated frame that will be filled with data. * The data must be freed using av_frame_unref() / av_frame_free() |