From 4f7dfe12eaffe2ec2399cc52ce9a8cb9f8fdb741 Mon Sep 17 00:00:00 2001 From: Stefano Sabatini Date: Tue, 6 Sep 2011 18:37:44 +0200 Subject: lavfi: rename vsink_buffer.c to sink_buffer.c, and vsink_buffer.h to buffersink.h This is done in order to clarify the non-video-specific nature of the buffersink code, as the result of the video/audio API unification of the previous commit, and for improving overall consistency. --- libavfilter/sink_buffer.c | 263 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 263 insertions(+) create mode 100644 libavfilter/sink_buffer.c (limited to 'libavfilter/sink_buffer.c') diff --git a/libavfilter/sink_buffer.c b/libavfilter/sink_buffer.c new file mode 100644 index 0000000000..6f7c542498 --- /dev/null +++ b/libavfilter/sink_buffer.c @@ -0,0 +1,263 @@ +/* + * Copyright (c) 2011 Stefano Sabatini + * + * 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 + * buffer video sink + */ + +#include "libavutil/fifo.h" +#include "avfilter.h" +#include "buffersink.h" + +AVBufferSinkParams *av_buffersink_params_alloc(void) +{ + static const int pixel_fmts[] = { -1 }; + AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams)); + if (!params) + return NULL; + + params->pixel_fmts = pixel_fmts; + return params; +} + +AVABufferSinkParams *av_abuffersink_params_alloc(void) +{ + static const int sample_fmts[] = { -1 }; + static const int packing_fmts[] = { -1 }; + static const int64_t channel_layouts[] = { -1 }; + AVABufferSinkParams *params = av_malloc(sizeof(AVABufferSinkParams)); + + if (!params) + return NULL; + + params->sample_fmts = sample_fmts; + params->channel_layouts = channel_layouts; + params->packing_fmts = packing_fmts; + return params; +} + +typedef struct { + AVFifoBuffer *fifo; ///< FIFO buffer of video frame references + + /* only used for video */ + const enum PixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1 + + /* only used for audio */ + const enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE + const int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1 + const int *packing_fmts; ///< list of accepted packing formats, terminated by -1 +} BufferSinkContext; + +#define FIFO_INIT_SIZE 8 + +static av_cold int common_init(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + + buf->fifo = av_fifo_alloc(FIFO_INIT_SIZE*sizeof(AVFilterBufferRef *)); + if (!buf->fifo) { + av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n"); + return AVERROR(ENOMEM); + } + return 0; +} + +static av_cold void common_uninit(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterBufferRef *picref; + + if (buf->fifo) { + while (av_fifo_size(buf->fifo) >= sizeof(AVFilterBufferRef *)) { + av_fifo_generic_read(buf->fifo, &picref, sizeof(picref), NULL); + avfilter_unref_buffer(picref); + } + av_fifo_free(buf->fifo); + buf->fifo = NULL; + } +} + +static void end_frame(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + BufferSinkContext *buf = inlink->dst->priv; + + if (av_fifo_space(buf->fifo) < sizeof(AVFilterBufferRef *)) { + /* realloc fifo size */ + if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) { + av_log(ctx, AV_LOG_ERROR, + "Cannot buffer more frames. Consume some available frames " + "before adding new ones.\n"); + return; + } + } + + /* cache frame */ + av_fifo_generic_write(buf->fifo, + &inlink->cur_buf, sizeof(AVFilterBufferRef *), NULL); +} + +int av_buffersink_get_buffer_ref(AVFilterContext *ctx, + AVFilterBufferRef **bufref, int flags) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterLink *inlink = ctx->inputs[0]; + int ret; + *bufref = NULL; + + /* no picref available, fetch it from the filterchain */ + if (!av_fifo_size(buf->fifo)) { + if ((ret = avfilter_request_frame(inlink)) < 0) + return ret; + } + + if (!av_fifo_size(buf->fifo)) + return AVERROR(EINVAL); + + if (flags & AV_BUFFERSINK_FLAG_PEEK) + *bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0)); + else + av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL); + + return 0; +} + +#if FF_API_OLD_VSINK_API +int av_vsink_buffer_get_video_buffer_ref(AVFilterContext *ctx, + AVFilterBufferRef **picref, int flags) +{ + return av_buffersink_get_buffer_ref(ctx, picref, flags); +} +#endif + +#if CONFIG_BUFFERSINK_FILTER + +static av_cold int vsink_init(AVFilterContext *ctx, const char *args, void *opaque) +{ + BufferSinkContext *buf = ctx->priv; + av_unused AVBufferSinkParams *params; + + if (!opaque) { + av_log(ctx, AV_LOG_ERROR, + "No opaque field provided\n"); + return AVERROR(EINVAL); + } else { +#if FF_API_OLD_VSINK_API + buf->pixel_fmts = (const enum PixelFormats *)opaque; +#else + params = (AVBufferSinkParams *)opaque; + buf->pixel_fmts = params->pixel_fmts; +#endif + } + + return common_init(ctx); +} + +static int vsink_query_formats(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + + avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(buf->pixel_fmts)); + return 0; +} + +AVFilter avfilter_vsink_buffersink = { + .name = "buffersink", + .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."), + .priv_size = sizeof(BufferSinkContext), + .init = vsink_init, + .uninit = common_uninit, + + .query_formats = vsink_query_formats, + + .inputs = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .end_frame = end_frame, + .min_perms = AV_PERM_READ, }, + { .name = NULL }}, + .outputs = (AVFilterPad[]) {{ .name = NULL }}, +}; + +#endif /* CONFIG_BUFFERSINK_FILTER */ + +#if CONFIG_ABUFFERSINK_FILTER + +static void filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) +{ + end_frame(link); +} + +static av_cold int asink_init(AVFilterContext *ctx, const char *args, void *opaque) +{ + BufferSinkContext *buf = ctx->priv; + AVABufferSinkParams *params; + + if (!opaque) { + av_log(ctx, AV_LOG_ERROR, + "No opaque field provided, an AVABufferSinkParams struct is required\n"); + return AVERROR(EINVAL); + } else + params = (AVABufferSinkParams *)opaque; + + buf->sample_fmts = params->sample_fmts; + buf->channel_layouts = params->channel_layouts; + buf->packing_fmts = params->packing_fmts; + + return common_init(ctx); +} + +static int asink_query_formats(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterFormats *formats = NULL; + + if (!(formats = avfilter_make_format_list(buf->sample_fmts))) + return AVERROR(ENOMEM); + avfilter_set_common_sample_formats(ctx, formats); + + if (!(formats = avfilter_make_format64_list(buf->channel_layouts))) + return AVERROR(ENOMEM); + avfilter_set_common_channel_layouts(ctx, formats); + + if (!(formats = avfilter_make_format_list(buf->packing_fmts))) + return AVERROR(ENOMEM); + avfilter_set_common_packing_formats(ctx, formats); + + return 0; +} + +AVFilter avfilter_asink_abuffersink = { + .name = "abuffersink", + .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), + .init = asink_init, + .uninit = common_uninit, + .priv_size = sizeof(BufferSinkContext), + .query_formats = asink_query_formats, + + .inputs = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_samples = filter_samples, + .min_perms = AV_PERM_READ, }, + { .name = NULL }}, + .outputs = (AVFilterPad[]) {{ .name = NULL }}, +}; + +#endif /* CONFIG_ABUFFERSINK_FILTER */ -- cgit v1.2.3