/* * 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/mem.h"#include "libavutil/opt.h" #include "audio.h"#include "avfilter.h"#include "avfilter_internal.h"#include "buffersink.h"#include "filters.h"#include "formats.h"#include "framequeue.h"#include "video.h" typedef struct BufferSinkContext {    const AVClass *class;    unsigned warning_limit;    unsigned frame_size;     /* only used for video */#if FF_API_BUFFERSINK_OPTS    enum AVPixelFormat *pixel_fmts;     ///< list of accepted pixel formats    int pixel_fmts_size;    enum AVColorSpace *color_spaces;    ///< list of accepted color spaces    int color_spaces_size;    enum AVColorRange *color_ranges;    ///< list of accepted color ranges    int color_ranges_size;#endif     enum AVPixelFormat *pixel_formats;    unsigned         nb_pixel_formats;     int                *colorspaces;    unsigned         nb_colorspaces;     int                *colorranges;    unsigned         nb_colorranges;     /* only used for audio */#if FF_API_BUFFERSINK_OPTS    enum AVSampleFormat *sample_fmts;   ///< list of accepted sample formats    int sample_fmts_size;    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;#endif     enum AVSampleFormat *sample_formats;    unsigned          nb_sample_formats;     int                 *samplerates;    unsigned          nb_samplerates;     AVChannelLayout     *channel_layouts;    unsigned          nb_channel_layouts;     AVFrame *peeked_frame;} BufferSinkContext; 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];    FilterLinkInternal *li = ff_link_internal(inlink);    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 (li->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,                              ff_filter_link(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;    int ret = 0; #if FF_API_BUFFERSINK_OPTS #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); \        }     if (ctx->input_pads[0].type == AVMEDIA_TYPE_VIDEO) {        if ((buf->pixel_fmts_size || buf->color_spaces_size || buf->color_ranges_size) &&            (buf->nb_pixel_formats || buf->nb_colorspaces || buf->nb_colorranges)) {            av_log(ctx, AV_LOG_ERROR, "Cannot combine old and new format lists\n");            return AVERROR(EINVAL);        }         CHECK_LIST_SIZE(pixel_fmts)        CHECK_LIST_SIZE(color_spaces)        CHECK_LIST_SIZE(color_ranges)    } else {        if ((buf->sample_fmts_size || buf->channel_layouts_str || buf->sample_rates_size) &&            (buf->nb_sample_formats || buf->nb_samplerates || buf->nb_channel_layouts)) {            av_log(ctx, AV_LOG_ERROR, "Cannot combine old and new format lists\n");            return AVERROR(EINVAL);        }         CHECK_LIST_SIZE(sample_fmts)        CHECK_LIST_SIZE(sample_rates)         if (buf->channel_layouts_str) {            const char *cur = buf->channel_layouts_str;             if (buf->all_channel_counts)                av_log(ctx, AV_LOG_WARNING,                       "Conflicting all_channel_counts and list in options\n");             while (cur) {                void *tmp;                char *next = strchr(cur, '|');                if (next)                    *next++ = 0;                 // +2 for the new element and terminator                tmp = av_realloc_array(buf->channel_layouts, buf->nb_channel_layouts + 2,                                       sizeof(*buf->channel_layouts));                if (!tmp)                    return AVERROR(ENOMEM);                 buf->channel_layouts = tmp;                memset(&buf->channel_layouts[buf->nb_channel_layouts], 0,                       sizeof(*buf->channel_layouts) * 2);                buf->nb_channel_layouts++;                 ret = av_channel_layout_from_string(&buf->channel_layouts[buf->nb_channel_layouts - 1], cur);                if (ret < 0) {                    av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout: %s.\n", cur);                    return ret;                }                if (ret < 0)                    return ret;                 cur = next;            }             if (buf->nb_channel_layouts)                buf->channel_layouts[buf->nb_channel_layouts] = (AVChannelLayout){ 0 };        }    } #undef CHECK_LIST_SIZE #endif     buf->warning_limit = 100;    return 0;} #define TERMINATE_ARRAY(arr, val)                                                   \    if (s->arr) {                                                                   \        void *tmp = av_realloc_array(s->arr, s->nb_ ## arr + 1, sizeof(*s->arr));   \        if (!tmp)                                                                   \            return AVERROR(ENOMEM);                                                 \        s->arr = tmp;                                                               \        s->arr[s->nb_ ## arr] = val;                                                \    } static int init_video(AVFilterContext *ctx){    BufferSinkContext *s = ctx->priv;     TERMINATE_ARRAY(pixel_formats, AV_PIX_FMT_NONE);    TERMINATE_ARRAY(colorranges, -1);    TERMINATE_ARRAY(colorspaces, -1);     return common_init(ctx);} static int init_audio(AVFilterContext *ctx){    BufferSinkContext *s = ctx->priv;     TERMINATE_ARRAY(sample_formats, AV_SAMPLE_FMT_NONE);    TERMINATE_ARRAY(samplerates, -1);    TERMINATE_ARRAY(channel_layouts, (AVChannelLayout){ .nb_channels = 0 });     return common_init(ctx);} #undef TERMINATE_ARRAY static void uninit(AVFilterContext *ctx){    BufferSinkContext *buf = ctx->priv;     av_frame_free(&buf->peeked_frame);} static int activate(AVFilterContext *ctx){    BufferSinkContext *buf = ctx->priv;    FilterLinkInternal * const li = ff_link_internal(ctx->inputs[0]);     if (buf->warning_limit &&        ff_framequeue_queued_frames(&li->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;} static int config_input_audio(AVFilterLink *inlink){    BufferSinkContext *buf = inlink->dst->priv;    FilterLink *l = ff_filter_link(inlink);     l->min_samples = l->max_samples = buf->frame_size;     return 0;} void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size){    BufferSinkContext *buf = ctx->priv;    buf->frame_size = frame_size;     if (ctx->inputs && ctx->inputs[0]) {        FilterLink *l = ff_filter_link(ctx->inputs[0]);        l->min_samples = l->max_samples = buf->frame_size;    }} #define MAKE_AVFILTERLINK_ACCESSOR(type, field) \type av_buffersink_get_##field(const AVFilterContext *ctx) { \    av_assert0(fffilter(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(int              , w                  )MAKE_AVFILTERLINK_ACCESSOR(int              , h                  )MAKE_AVFILTERLINK_ACCESSOR(AVRational       , sample_aspect_ratio)MAKE_AVFILTERLINK_ACCESSOR(enum AVColorSpace, colorspace)MAKE_AVFILTERLINK_ACCESSOR(enum AVColorRange, color_range) MAKE_AVFILTERLINK_ACCESSOR(int              , sample_rate        ) AVRational av_buffersink_get_frame_rate(const AVFilterContext *ctx){    FilterLink *l = ff_filter_link(ctx->inputs[0]);    av_assert0(fffilter(ctx->filter)->activate == activate);    return l->frame_rate;} AVBufferRef* av_buffersink_get_hw_frames_ctx(const AVFilterContext *ctx){    FilterLink *l = ff_filter_link(ctx->inputs[0]);    av_assert0(fffilter(ctx->filter)->activate == activate);    return l->hw_frames_ctx;} int av_buffersink_get_channels(const AVFilterContext *ctx){    av_assert0(fffilter(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(fffilter(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;} const AVFrameSideData *const *av_buffersink_get_side_data(const AVFilterContext *ctx,                                                          int *nb_side_data){    av_assert0(fffilter(ctx->filter)->activate == activate);    *nb_side_data = ctx->inputs[0]->nb_side_data;    return (const AVFrameSideData *const *)ctx->inputs[0]->side_data;} #if FF_API_BUFFERSINK_OPTS#define NB_ITEMS(list) (list ## _size / sizeof(*list))#endif static int vsink_query_formats(const AVFilterContext *ctx,                               AVFilterFormatsConfig **cfg_in,                               AVFilterFormatsConfig **cfg_out){    const BufferSinkContext *buf = ctx->priv;    int ret; #if FF_API_BUFFERSINK_OPTS    if (buf->nb_pixel_formats || buf->nb_colorspaces || buf->nb_colorranges) {#endif        if (buf->nb_pixel_formats) {            ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, buf->pixel_formats);            if (ret < 0)                return ret;        }        if (buf->nb_colorspaces) {            ret = ff_set_common_color_spaces_from_list2(ctx, cfg_in, cfg_out, buf->colorspaces);            if (ret < 0)                return ret;        }        if (buf->nb_colorranges) {            ret = ff_set_common_color_ranges_from_list2(ctx, cfg_in, cfg_out, buf->colorranges);            if (ret < 0)                return ret;        }#if FF_API_BUFFERSINK_OPTS    } else {    unsigned i;    if (buf->pixel_fmts_size) {        AVFilterFormats *formats = NULL;        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_formats2(ctx, cfg_in, cfg_out, formats)) < 0)            return ret;    }     if (buf->color_spaces_size) {        AVFilterFormats *formats = NULL;        for (i = 0; i < NB_ITEMS(buf->color_spaces); i++)            if ((ret = ff_add_format(&formats, buf->color_spaces[i])) < 0)                return ret;        if ((ret = ff_set_common_color_spaces2(ctx, cfg_in, cfg_out, formats)) < 0)            return ret;    }     if (buf->color_ranges_size) {        AVFilterFormats *formats = NULL;        for (i = 0; i < NB_ITEMS(buf->color_ranges); i++)            if ((ret = ff_add_format(&formats, buf->color_ranges[i])) < 0)                return ret;        if ((ret = ff_set_common_color_ranges2(ctx, cfg_in, cfg_out, formats)) < 0)            return ret;    }    }#endif     return 0;} static int asink_query_formats(const AVFilterContext *ctx,                               AVFilterFormatsConfig **cfg_in,                               AVFilterFormatsConfig **cfg_out){    const BufferSinkContext *buf = ctx->priv;    int ret; #if FF_API_BUFFERSINK_OPTS    if (buf->nb_sample_formats || buf->nb_samplerates || buf->nb_channel_layouts) {#endif        if (buf->nb_sample_formats) {            ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, buf->sample_formats);            if (ret < 0)                return ret;        }        if (buf->nb_samplerates) {            ret = ff_set_common_samplerates_from_list2(ctx, cfg_in, cfg_out, buf->samplerates);            if (ret < 0)                return ret;        }        if (buf->nb_channel_layouts) {            ret = ff_set_common_channel_layouts_from_list2(ctx, cfg_in, cfg_out, buf->channel_layouts);            if (ret < 0)                return ret;        }#if FF_API_BUFFERSINK_OPTS    } else {    AVFilterFormats *formats = NULL;    unsigned i;     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_formats2(ctx, cfg_in, cfg_out, formats)) < 0)            return ret;    }     if (buf->nb_channel_layouts) {        ret = ff_set_common_channel_layouts_from_list2(ctx, cfg_in, cfg_out, buf->channel_layouts);        if (ret < 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_samplerates2(ctx, cfg_in, cfg_out, formats)) < 0)            return ret;    }    }#endif     return 0;} #define OFFSET(x) offsetof(BufferSinkContext, x)#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAMstatic const AVOption buffersink_options[] = {#if FF_API_BUFFERSINK_OPTS

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