/* * 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 sink */ #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/channel_layout.h" #include "libavutil/common.h" #include "libavutil/internal.h" #include "libavutil/opt.h" #define FF_INTERNAL_FIELDS 1 #include "framequeue.h" #include "audio.h" #include "avfilter.h" #include "buffersink.h" #include "filters.h" #include "formats.h" #include "internal.h" #include "video.h" typedef struct BufferSinkContext { const AVClass *class; unsigned warning_limit; /* only used for video */ enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats int pixel_fmts_size; /* only used for audio */ enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats int sample_fmts_size; #if FF_API_OLD_CHANNEL_LAYOUT int64_t *channel_layouts; ///< list of accepted channel layouts int channel_layouts_size; int *channel_counts; ///< list of accepted channel counts int channel_counts_size; #endif char *channel_layouts_str; ///< list of accepted channel layouts int all_channel_counts; int *sample_rates; ///< list of accepted sample rates int sample_rates_size; AVFrame *peeked_frame; } BufferSinkContext; #define NB_ITEMS(list) (list ## _size / sizeof(*list)) #if FF_API_OLD_CHANNEL_LAYOUT static void cleanup_redundant_layouts(AVFilterContext *ctx) { BufferSinkContext *buf = ctx->priv; int nb_layouts = NB_ITEMS(buf->channel_layouts); int nb_counts = NB_ITEMS(buf->channel_counts); uint64_t counts = 0; int i, lc, n; for (i = 0; i < nb_counts; i++) if (buf->channel_counts[i] < 64) counts |= (uint64_t)1 << buf->channel_counts[i]; for (i = lc = 0; i < nb_layouts; i++) { n = av_popcount64(buf->channel_layouts[i]); if (n < 64 && (counts & ((uint64_t)1 << n))) av_log(ctx, AV_LOG_WARNING, "Removing channel layout 0x%"PRIx64", redundant with %d channels\n", buf->channel_layouts[i], n); else buf->channel_layouts[lc++] = buf->channel_layouts[i]; } buf->channel_layouts_size = lc * sizeof(*buf->channel_layouts); } #endif int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame) { return av_buffersink_get_frame_flags(ctx, frame, 0); } static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags) { if ((flags & AV_BUFFERSINK_FLAG_PEEK)) { buf->peeked_frame = in; return out ? av_frame_ref(out, in) : 0; } else { av_assert1(out); buf->peeked_frame = NULL; av_frame_move_ref(out, in); av_frame_free(&in); return 0; } } static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples) { BufferSinkContext *buf = ctx->priv; AVFilterLink *inlink = ctx->inputs[0]; int status, ret; AVFrame *cur_frame; int64_t pts; if (buf->peeked_frame) return return_or_keep_frame(buf, frame, buf->peeked_frame, flags); while (1) { ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) : ff_inlink_consume_frame(inlink, &cur_frame); if (ret < 0) { return ret; } else if (ret) { /* TODO return the frame instead of copying it */ return return_or_keep_frame(buf, frame, cur_frame, flags); } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) { return status; } else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) { return AVERROR(EAGAIN); } else if (inlink->frame_wanted_out) { ret = ff_filter_graph_run_once(ctx->graph); if (ret < 0) return ret; } else { ff_inlink_request_frame(inlink); } } } int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags) { return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples); } int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples) { return get_frame_internal(ctx, frame, 0, nb_samples); } static av_cold int common_init(AVFilterContext *ctx) { BufferSinkContext *buf = ctx->priv; buf->warning_limit = 100; return 0; } static void uninit(AVFilterContext *ctx) { BufferSinkContext *buf = ctx->priv; av_frame_free(&buf->peeked_frame); } static int activate(AVFilterContext *ctx) { BufferSinkContext *buf = ctx->priv; if (buf->warning_limit && ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= buf->warning_limit) { av_log(ctx, AV_LOG_WARNING, "%d buffers queued in %s, something may be wrong.\n", buf->warning_limit, (char *)av_x_if_null(ctx->name, ctx->filter->name)); buf->warning_limit *= 10; } /* The frame is queued, the rest is up to get_frame_internal */ return 0; } void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size) { AVFilterLink *inlink = ctx->inputs[0]; inlink->min_samples = inlink->max_samples = frame_size; } #define MAKE_AVFILTERLINK_ACCESSOR(type, field) \ type av_buffersink_get_##field(const AVFilterContext *ctx) { \ av_assert0(ctx->filter->activate == activate); \ return ctx->inputs[0]->field; \ } MAKE_AVFILTERLINK_ACCESSOR(enum AVMediaType , type ) MAKE_AVFILTERLINK_ACCESSOR(AVRational , time_base ) MAKE_AVFILTERLINK_ACCESSOR(int , format ) MAKE_AVFILTERLINK_ACCESSOR(AVRational , frame_rate ) MAKE_AVFILTERLINK_ACCESSOR(int , w ) MAKE_AVFILTERLINK_ACCESSOR(int , h ) MAKE_AVFILTERLINK_ACCESSOR(AVRational , sample_aspect_ratio) #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS MAKE_AVFILTERLINK_ACCESSOR(uint64_t , channel_layout ) FF_ENABLE_DEPRECATION_WARNINGS #endif MAKE_AVFILTERLINK_ACCESSOR(int , sample_rate ) MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef * , hw_frames_ctx ) int av_buffersink_get_channels(const AVFilterContext *ctx) { av_assert0(ctx->filter->activate == activate); return ctx->inputs[0]->ch_layout.nb_channels; } int av_buffersink_get_ch_layout(const AVFilterContext *ctx, AVChannelLayout *out) { AVChannelLayout ch_layout = { 0 }; int ret; av_assert0(ctx->filter->activate == activate); ret = av_channel_layout_copy(&ch_layout, &ctx->inputs[0]->ch_layout); if (ret < 0) return ret; *out = ch_layout; return 0; } #define CHECK_LIST_SIZE(field) \ if (buf->field ## _size % sizeof(*buf->field)) { \ av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \ "should be multiple of %d\n", \ buf->field ## _size, (int)sizeof(*buf->field)); \ return AVERROR(EINVAL); \ } static int vsink_query_formats(AVFilterContext *ctx) { BufferSinkContext *buf = ctx->priv; AVFilterFormats *formats = NULL; unsigned i; int ret; CHECK_LIST_SIZE(pixel_fmts) if (buf->pixel_fmts_size) { for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++) if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0) return ret; if ((ret = ff_set_common_formats(ctx, formats)) < 0) return ret; } else { if ((ret = ff_default_query_formats(ctx)) < 0) return ret; } return 0; } static int asink_query_formats(AVFilterContext *ctx) { BufferSinkContext *buf = ctx->priv; AVFilterFormats *formats = NULL; AVChannelLayout layout = { 0 }; AVFilterChannelLayouts *layouts = NULL; unsigned i; int ret; CHECK_LIST_SIZE(sample_fmts) CHECK_LIST_SIZE(sample_rates) #if FF_API_OLD_CHANNEL_LAYOUT CHECK_LIST_SIZE(channel_layouts) CHECK_LIST_SIZE(channel_counts) #endif if (buf->sample_fmts_size) { for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++) if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0) return ret; if ((ret = ff_set_common_formats(ctx, formats)) < 0) return ret; } if ( #if FF_API_OLD_CHANNEL_LAYOUT buf->channel_layouts_size || buf->channel_counts_size || #endif buf->channel_layouts_str || buf->all_channel_counts) { #if FF_API_OLD_CHANNEL_LAYOUT cleanup_redundant_layouts(ctx); for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++) if ((ret = av_channel_layout_from_mask(&layout, buf->channel_layouts[i])) < 0 || (ret = ff_add_channel_layout(&layouts, &layout)) < 0) return ret; for (i = 0; i < NB_ITEMS(buf->channel_counts); i++) { layout = FF_COUNT2LAYOUT(buf->channel_counts[i]); if ((ret = ff_add_channel_layout(&layouts, &layout)) < 0) return ret; } #endif if (buf->channel_layouts_str) { const char *cur = buf->channel_layouts_str; #if FF_API_OLD_CHANNEL_LAYOUT if (layouts) av_log(ctx, AV_LOG_WARNING, "Conflicting ch_layouts and list of channel_counts/channel_layouts. Ignoring the former\n"); else #endif while (cur) { char *next = strchr(cur, '|'); if (next) *next++ = 0; ret = av_channel_layout_from_string(&layout, cur); if (ret < 0) { av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout: %s.\n", cur); return ret; } ret = ff_add_channel_layout(&layouts, &layout); av_channel_layout_uninit(&layout); if (ret < 0) return ret; cur = next; } } if (buf->all_channel_counts) { if (layouts) av_log(ctx, AV_LOG_WARNING, "Conflicting all_channel_counts and list in options\n"); else if (!(layouts = ff_all_channel_counts())) return AVERROR(ENOMEM); } if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0) return ret; } if (buf->sample_rates_size) { formats = NULL; for (i = 0; i < NB_ITEMS(buf->sample_rates); i++) if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0) return ret; if ((ret = ff_set_common_samplerates(ctx, formats)) < 0) return ret; } return 0; } #define OFFSET(x) offsetof(BufferSinkContext, x) #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM static const AVOption buffersink_options[] = { { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS }, { NULL }, }; #undef FLAGS #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM static const AVOption abuffersink_options[] = { { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS }, { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS }, #if FF_API_OLD_CHANNEL_LAYOUT { "channel_layouts", "set the supported channel layouts (deprecated, use ch_layouts)", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS | AV_OPT_FLAG_DEPRECATED }, { "channel_counts", "set the supported channel counts (deprecated, use ch_layouts)", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS | AV_OPT_FLAG_DEPRECATED }, #endif { "ch_layouts", "set a '|'-separated list of supported channel layouts", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = FLAGS }, { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, { NULL }, }; #undef FLAGS AVFILTER_DEFINE_CLASS(buffersink); AVFILTER_DEFINE_CLASS(abuffersink); const AVFilter ff_vsink_buffer = { .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), .priv_class = &buffersink_class, .init = common_init, .uninit = uninit, .activate = activate, FILTER_INPUTS(ff_video_default_filterpad), .outputs = NULL, FILTER_QUERY_FUNC(vsink_query_formats), }; const AVFilter ff_asink_abuffer = { .name = "abuffersink", .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), .priv_class = &abuffersink_class, .priv_size = sizeof(BufferSinkContext), .init = common_init, .uninit = uninit, .activate = activate, FILTER_INPUTS(ff_audio_default_filterpad), .outputs = NULL, FILTER_QUERY_FUNC(asink_query_formats), };