/* * 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/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 "internal.h" typedef struct BufferSinkContext {    const AVClass *class;    unsigned warning_limit;     /* only used for video */    enum AVPixelFormat *pixel_fmts;           ///< list of accepted pixel formats, must be terminated with -1    int pixel_fmts_size;     /* only used for audio */    enum AVSampleFormat *sample_fmts;       ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE    int sample_fmts_size;    int64_t *channel_layouts;               ///< list of accepted channel layouts, terminated by -1    int channel_layouts_size;    int *channel_counts;                    ///< list of accepted channel counts, terminated by -1    int channel_counts_size;    int all_channel_counts;    int *sample_rates;                      ///< list of accepted sample rates, terminated by -1    int sample_rates_size;     AVFrame *peeked_frame;} BufferSinkContext; #define NB_ITEMS(list) (list ## _size / sizeof(*list))#define FIFO_INIT_SIZE 8#define FIFO_INIT_ELEMENT_SIZE sizeof(void *) 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);} AVBufferSinkParams *av_buffersink_params_alloc(void){    static const int pixel_fmts[] = { AV_PIX_FMT_NONE };    AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));    if (!params)        return NULL;     params->pixel_fmts = pixel_fmts;    return params;} AVABufferSinkParams *av_abuffersink_params_alloc(void){    AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));     if (!params)        return NULL;    return params;} static av_cold int common_init(AVFilterContext *ctx){    BufferSinkContext *buf = ctx->priv;     buf->warning_limit = 100;    return 0;} 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 =    inlink->partial_buf_size = 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) MAKE_AVFILTERLINK_ACCESSOR(int              , channels           )MAKE_AVFILTERLINK_ACCESSOR(uint64_t         , channel_layout     )MAKE_AVFILTERLINK_ACCESSOR(int              , sample_rate        ) MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef *    , hw_frames_ctx      ) static av_cold int vsink_init(AVFilterContext *ctx, void *opaque){    BufferSinkContext *buf = ctx->priv;    AVBufferSinkParams *params = opaque;    int ret;     if (params) {        if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)            return ret;    }     return common_init(ctx);} #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 av_cold int asink_init(AVFilterContext *ctx, void *opaque){    BufferSinkContext *buf = ctx->priv;    AVABufferSinkParams *params = opaque;    int ret;     if (params) {        if ((ret = av_opt_set_int_list(buf, "sample_fmts",     params->sample_fmts,  AV_SAMPLE_FMT_NONE, 0)) < 0 ||            (ret = av_opt_set_int_list(buf, "sample_rates",    params->sample_rates,    -1, 0)) < 0 ||            (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||            (ret = av_opt_set_int_list(buf, "channel_counts",  params->channel_counts,  -1, 0)) < 0 ||            (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)            return ret;    }    return common_init(ctx);} static int asink_query_formats(AVFilterContext *ctx){    BufferSinkContext *buf = ctx->priv;    AVFilterFormats *formats = NULL;    AVFilterChannelLayouts *layouts = NULL;    unsigned i;    int ret;     CHECK_LIST_SIZE(sample_fmts)    CHECK_LIST_SIZE(sample_rates)    CHECK_LIST_SIZE(channel_layouts)    CHECK_LIST_SIZE(channel_counts)     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 (buf->channel_layouts_size || buf->channel_counts_size ||        buf->all_channel_counts) {        for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)            if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)                return ret;        for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)            if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)                return ret;        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_PARAMstatic 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_VIDEO_PARAMstatic 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 },    { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },    { "channel_counts",  "set the supported channel counts",  OFFSET(channel_counts),  AV_OPT_TYPE_BINARY, .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); static const AVFilterPad avfilter_vsink_buffer_inputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_VIDEO,    },    { NULL }}; 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_opaque = vsink_init,     .query_formats = vsink_query_formats,    .activate    = activate,    .inputs      = avfilter_vsink_buffer_inputs,    .outputs     = NULL,}; static const AVFilterPad avfilter_asink_abuffer_inputs[] = {    {        .name         = "default",        .type         = AVMEDIA_TYPE_AUDIO,    },    { NULL }}; 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_opaque = asink_init,     .query_formats = asink_query_formats,    .activate    = activate,    .inputs      = avfilter_asink_abuffer_inputs,    .outputs     = NULL,};