LCOV - code coverage report
Current view: top level - src/libavfilter - buffersrc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 139 217 64.1 %
Date: 2017-07-21 15:41:20 Functions: 12 14 85.7 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2008 Vitor Sessak
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : /**
      22             :  * @file
      23             :  * memory buffer source filter
      24             :  */
      25             : 
      26             : #include <float.h>
      27             : 
      28             : #include "libavutil/channel_layout.h"
      29             : #include "libavutil/common.h"
      30             : #include "libavutil/fifo.h"
      31             : #include "libavutil/frame.h"
      32             : #include "libavutil/imgutils.h"
      33             : #include "libavutil/internal.h"
      34             : #include "libavutil/opt.h"
      35             : #include "libavutil/samplefmt.h"
      36             : #include "audio.h"
      37             : #include "avfilter.h"
      38             : #include "buffersrc.h"
      39             : #include "formats.h"
      40             : #include "internal.h"
      41             : #include "video.h"
      42             : 
      43             : typedef struct BufferSourceContext {
      44             :     const AVClass    *class;
      45             :     AVFifoBuffer     *fifo;
      46             :     AVRational        time_base;     ///< time_base to set in the output link
      47             :     AVRational        frame_rate;    ///< frame_rate to set in the output link
      48             :     unsigned          nb_failed_requests;
      49             :     unsigned          warning_limit;
      50             : 
      51             :     /* video only */
      52             :     int               w, h;
      53             :     enum AVPixelFormat  pix_fmt;
      54             :     AVRational        pixel_aspect;
      55             :     char              *sws_param;
      56             : 
      57             :     AVBufferRef *hw_frames_ctx;
      58             : 
      59             :     /* audio only */
      60             :     int sample_rate;
      61             :     enum AVSampleFormat sample_fmt;
      62             :     int channels;
      63             :     uint64_t channel_layout;
      64             :     char    *channel_layout_str;
      65             : 
      66             :     int got_format_from_params;
      67             :     int eof;
      68             : } BufferSourceContext;
      69             : 
      70             : #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\
      71             :     if (c->w != width || c->h != height || c->pix_fmt != format) {\
      72             :         av_log(s, AV_LOG_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\
      73             :     }
      74             : 
      75             : #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format)\
      76             :     if (c->sample_fmt != format || c->sample_rate != srate ||\
      77             :         c->channel_layout != ch_layout || c->channels != ch_count) {\
      78             :         av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
      79             :         return AVERROR(EINVAL);\
      80             :     }
      81             : 
      82        4084 : AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
      83             : {
      84        4084 :     AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
      85        4084 :     if (!par)
      86           0 :         return NULL;
      87             : 
      88        4084 :     par->format = -1;
      89             : 
      90        4084 :     return par;
      91             : }
      92             : 
      93        4084 : int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
      94             : {
      95        4084 :     BufferSourceContext *s = ctx->priv;
      96             : 
      97        4084 :     if (param->time_base.num > 0 && param->time_base.den > 0)
      98           0 :         s->time_base = param->time_base;
      99             : 
     100        4084 :     switch (ctx->filter->outputs[0].type) {
     101        4084 :     case AVMEDIA_TYPE_VIDEO:
     102        4084 :         if (param->format != AV_PIX_FMT_NONE) {
     103           0 :             s->got_format_from_params = 1;
     104           0 :             s->pix_fmt = param->format;
     105             :         }
     106        4084 :         if (param->width > 0)
     107           0 :             s->w = param->width;
     108        4084 :         if (param->height > 0)
     109           0 :             s->h = param->height;
     110        4084 :         if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
     111           0 :             s->pixel_aspect = param->sample_aspect_ratio;
     112        4084 :         if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
     113           0 :             s->frame_rate = param->frame_rate;
     114        4084 :         if (param->hw_frames_ctx) {
     115           0 :             av_buffer_unref(&s->hw_frames_ctx);
     116           0 :             s->hw_frames_ctx = av_buffer_ref(param->hw_frames_ctx);
     117           0 :             if (!s->hw_frames_ctx)
     118           0 :                 return AVERROR(ENOMEM);
     119             :         }
     120        4084 :         break;
     121           0 :     case AVMEDIA_TYPE_AUDIO:
     122           0 :         if (param->format != AV_SAMPLE_FMT_NONE) {
     123           0 :             s->got_format_from_params = 1;
     124           0 :             s->sample_fmt = param->format;
     125             :         }
     126           0 :         if (param->sample_rate > 0)
     127           0 :             s->sample_rate = param->sample_rate;
     128           0 :         if (param->channel_layout)
     129           0 :             s->channel_layout = param->channel_layout;
     130           0 :         break;
     131           0 :     default:
     132           0 :         return AVERROR_BUG;
     133             :     }
     134             : 
     135        4084 :     return 0;
     136             : }
     137             : 
     138           0 : int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
     139             : {
     140           0 :     return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
     141             :                                         AV_BUFFERSRC_FLAG_KEEP_REF);
     142             : }
     143             : 
     144          21 : int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
     145             : {
     146          21 :     return av_buffersrc_add_frame_flags(ctx, frame, 0);
     147             : }
     148             : 
     149             : static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
     150             :                                            AVFrame *frame, int flags);
     151             : 
     152      382763 : int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
     153             : {
     154      382763 :     AVFrame *copy = NULL;
     155      382763 :     int ret = 0;
     156             : 
     157      664564 :     if (frame && frame->channel_layout &&
     158      281801 :         av_get_channel_layout_nb_channels(frame->channel_layout) != frame->channels) {
     159           0 :         av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
     160           0 :         return AVERROR(EINVAL);
     161             :     }
     162             : 
     163      382763 :     if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame)
     164      382452 :         return av_buffersrc_add_frame_internal(ctx, frame, flags);
     165             : 
     166         311 :     if (!(copy = av_frame_alloc()))
     167           0 :         return AVERROR(ENOMEM);
     168         311 :     ret = av_frame_ref(copy, frame);
     169         311 :     if (ret >= 0)
     170         311 :         ret = av_buffersrc_add_frame_internal(ctx, copy, flags);
     171             : 
     172         311 :     av_frame_free(&copy);
     173         311 :     return ret;
     174             : }
     175             : 
     176      382763 : static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
     177             :                                            AVFrame *frame, int flags)
     178             : {
     179      382763 :     BufferSourceContext *s = ctx->priv;
     180             :     AVFrame *copy;
     181             :     int refcounted, ret;
     182             : 
     183      382763 :     s->nb_failed_requests = 0;
     184             : 
     185      382763 :     if (!frame) {
     186        5097 :         s->eof = 1;
     187        5097 :         ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, AV_NOPTS_VALUE);
     188        5097 :         return 0;
     189      377666 :     } else if (s->eof)
     190           0 :         return AVERROR(EINVAL);
     191             : 
     192      377666 :     refcounted = !!frame->buf[0];
     193             : 
     194      377666 :     if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
     195             : 
     196      377666 :     switch (ctx->outputs[0]->type) {
     197       94831 :     case AVMEDIA_TYPE_VIDEO:
     198       94831 :         CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
     199             :                                  frame->format);
     200       94831 :         break;
     201      282835 :     case AVMEDIA_TYPE_AUDIO:
     202             :         /* For layouts unknown on input but known on link after negotiation. */
     203      282835 :         if (!frame->channel_layout)
     204        1034 :             frame->channel_layout = s->channel_layout;
     205      282835 :         CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
     206             :                                  frame->channels, frame->format);
     207      282835 :         break;
     208           0 :     default:
     209           0 :         return AVERROR(EINVAL);
     210             :     }
     211             : 
     212           0 :     }
     213             : 
     214      377666 :     if (!av_fifo_space(s->fifo) &&
     215           0 :         (ret = av_fifo_realloc2(s->fifo, av_fifo_size(s->fifo) +
     216             :                                          sizeof(copy))) < 0)
     217           0 :         return ret;
     218             : 
     219      377666 :     if (!(copy = av_frame_alloc()))
     220           0 :         return AVERROR(ENOMEM);
     221             : 
     222      377666 :     if (refcounted) {
     223      377666 :         av_frame_move_ref(copy, frame);
     224             :     } else {
     225           0 :         ret = av_frame_ref(copy, frame);
     226           0 :         if (ret < 0) {
     227           0 :             av_frame_free(&copy);
     228           0 :             return ret;
     229             :         }
     230             :     }
     231             : 
     232      377666 :     if ((ret = av_fifo_generic_write(s->fifo, &copy, sizeof(copy), NULL)) < 0) {
     233           0 :         if (refcounted)
     234           0 :             av_frame_move_ref(frame, copy);
     235           0 :         av_frame_free(&copy);
     236           0 :         return ret;
     237             :     }
     238             : 
     239      377666 :     if ((ret = ctx->output_pads[0].request_frame(ctx->outputs[0])) < 0)
     240           0 :         return ret;
     241             : 
     242      377666 :     return 0;
     243             : }
     244             : 
     245        4084 : static av_cold int init_video(AVFilterContext *ctx)
     246             : {
     247        4084 :     BufferSourceContext *c = ctx->priv;
     248             : 
     249        8168 :     if (!(c->pix_fmt != AV_PIX_FMT_NONE || c->got_format_from_params) || !c->w || !c->h ||
     250        4084 :         av_q2d(c->time_base) <= 0) {
     251           0 :         av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
     252           0 :         return AVERROR(EINVAL);
     253             :     }
     254             : 
     255        4084 :     if (!(c->fifo = av_fifo_alloc(sizeof(AVFrame*))))
     256           0 :         return AVERROR(ENOMEM);
     257             : 
     258        4084 :     av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d sws_param:%s\n",
     259             :            c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
     260             :            c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
     261        4084 :            c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, ""));
     262        4084 :     c->warning_limit = 100;
     263        4084 :     return 0;
     264             : }
     265             : 
     266      363118 : unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
     267             : {
     268      363118 :     return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
     269             : }
     270             : 
     271             : #define OFFSET(x) offsetof(BufferSourceContext, x)
     272             : #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
     273             : #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
     274             : 
     275             : static const AVOption buffer_options[] = {
     276             :     { "width",         NULL,                     OFFSET(w),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
     277             :     { "video_size",    NULL,                     OFFSET(w),                AV_OPT_TYPE_IMAGE_SIZE,                .flags = V },
     278             :     { "height",        NULL,                     OFFSET(h),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
     279             :     { "pix_fmt",       NULL,                     OFFSET(pix_fmt),          AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, .min = AV_PIX_FMT_NONE, .max = INT_MAX, .flags = V },
     280             : #if FF_API_OLD_FILTER_OPTS
     281             :     /* those 4 are for compatibility with the old option passing system where each filter
     282             :      * did its own parsing */
     283             :     { "time_base_num", "deprecated, do not use", OFFSET(time_base.num),    AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
     284             :     { "time_base_den", "deprecated, do not use", OFFSET(time_base.den),    AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
     285             :     { "sar_num",       "deprecated, do not use", OFFSET(pixel_aspect.num), AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
     286             :     { "sar_den",       "deprecated, do not use", OFFSET(pixel_aspect.den), AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
     287             : #endif
     288             :     { "sar",           "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
     289             :     { "pixel_aspect",  "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
     290             :     { "time_base",     NULL,                     OFFSET(time_base),        AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
     291             :     { "frame_rate",    NULL,                     OFFSET(frame_rate),       AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
     292             :     { "sws_param",     NULL,                     OFFSET(sws_param),        AV_OPT_TYPE_STRING,                    .flags = V },
     293             :     { NULL },
     294             : };
     295             : 
     296             : AVFILTER_DEFINE_CLASS(buffer);
     297             : 
     298             : static const AVOption abuffer_options[] = {
     299             :     { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
     300             :     { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
     301             :     { "sample_fmt",     NULL, OFFSET(sample_fmt),          AV_OPT_TYPE_SAMPLE_FMT, { .i64 = AV_SAMPLE_FMT_NONE }, .min = AV_SAMPLE_FMT_NONE, .max = INT_MAX, .flags = A },
     302             :     { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING,             .flags = A },
     303             :     { "channels",       NULL, OFFSET(channels),            AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
     304             :     { NULL },
     305             : };
     306             : 
     307             : AVFILTER_DEFINE_CLASS(abuffer);
     308             : 
     309        1059 : static av_cold int init_audio(AVFilterContext *ctx)
     310             : {
     311        1059 :     BufferSourceContext *s = ctx->priv;
     312        1059 :     int ret = 0;
     313             : 
     314        1059 :     if (!(s->sample_fmt != AV_SAMPLE_FMT_NONE || s->got_format_from_params)) {
     315           0 :         av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
     316           0 :         return AVERROR(EINVAL);
     317             :     }
     318             : 
     319        2116 :     if (s->channel_layout_str || s->channel_layout) {
     320             :         int n;
     321             : 
     322        1057 :         if (!s->channel_layout) {
     323        1057 :             s->channel_layout = av_get_channel_layout(s->channel_layout_str);
     324        1057 :             if (!s->channel_layout) {
     325           0 :                 av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
     326             :                        s->channel_layout_str);
     327           0 :                 return AVERROR(EINVAL);
     328             :             }
     329             :         }
     330        1057 :         n = av_get_channel_layout_nb_channels(s->channel_layout);
     331        1057 :         if (s->channels) {
     332           0 :             if (n != s->channels) {
     333           0 :                 av_log(ctx, AV_LOG_ERROR,
     334             :                        "Mismatching channel count %d and layout '%s' "
     335             :                        "(%d channels)\n",
     336             :                        s->channels, s->channel_layout_str, n);
     337           0 :                 return AVERROR(EINVAL);
     338             :             }
     339             :         }
     340        1057 :         s->channels = n;
     341           2 :     } else if (!s->channels) {
     342           0 :         av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
     343             :                                   "channel layout specified\n");
     344           0 :         return AVERROR(EINVAL);
     345             :     }
     346             : 
     347        1059 :     if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*))))
     348           0 :         return AVERROR(ENOMEM);
     349             : 
     350        1059 :     if (!s->time_base.num)
     351           0 :         s->time_base = (AVRational){1, s->sample_rate};
     352             : 
     353        1059 :     av_log(ctx, AV_LOG_VERBOSE,
     354             :            "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
     355             :            s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
     356             :            s->sample_rate, s->channel_layout_str);
     357        1059 :     s->warning_limit = 100;
     358             : 
     359        1059 :     return ret;
     360             : }
     361             : 
     362        5143 : static av_cold void uninit(AVFilterContext *ctx)
     363             : {
     364        5143 :     BufferSourceContext *s = ctx->priv;
     365       10286 :     while (s->fifo && av_fifo_size(s->fifo)) {
     366             :         AVFrame *frame;
     367           0 :         av_fifo_generic_read(s->fifo, &frame, sizeof(frame), NULL);
     368           0 :         av_frame_free(&frame);
     369             :     }
     370        5143 :     av_buffer_unref(&s->hw_frames_ctx);
     371        5143 :     av_fifo_freep(&s->fifo);
     372        5143 : }
     373             : 
     374        5143 : static int query_formats(AVFilterContext *ctx)
     375             : {
     376        5143 :     BufferSourceContext *c = ctx->priv;
     377        5143 :     AVFilterChannelLayouts *channel_layouts = NULL;
     378        5143 :     AVFilterFormats *formats = NULL;
     379        5143 :     AVFilterFormats *samplerates = NULL;
     380             :     int ret;
     381             : 
     382        5143 :     switch (ctx->outputs[0]->type) {
     383        4084 :     case AVMEDIA_TYPE_VIDEO:
     384        8168 :         if ((ret = ff_add_format         (&formats, c->pix_fmt)) < 0 ||
     385        4084 :             (ret = ff_set_common_formats (ctx     , formats   )) < 0)
     386           0 :             return ret;
     387        4084 :         break;
     388        1059 :     case AVMEDIA_TYPE_AUDIO:
     389        2118 :         if ((ret = ff_add_format             (&formats    , c->sample_fmt )) < 0 ||
     390        2118 :             (ret = ff_set_common_formats     (ctx         , formats       )) < 0 ||
     391        2118 :             (ret = ff_add_format             (&samplerates, c->sample_rate)) < 0 ||
     392        1059 :             (ret = ff_set_common_samplerates (ctx         , samplerates   )) < 0)
     393           0 :             return ret;
     394             : 
     395        1061 :         if ((ret = ff_add_channel_layout(&channel_layouts,
     396        1059 :                               c->channel_layout ? c->channel_layout :
     397           2 :                               FF_COUNT2LAYOUT(c->channels))) < 0)
     398           0 :             return ret;
     399        1059 :         if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
     400           0 :             return ret;
     401        1059 :         break;
     402           0 :     default:
     403           0 :         return AVERROR(EINVAL);
     404             :     }
     405             : 
     406        5143 :     return 0;
     407             : }
     408             : 
     409        5143 : static int config_props(AVFilterLink *link)
     410             : {
     411        5143 :     BufferSourceContext *c = link->src->priv;
     412             : 
     413        5143 :     switch (link->type) {
     414        4084 :     case AVMEDIA_TYPE_VIDEO:
     415        4084 :         link->w = c->w;
     416        4084 :         link->h = c->h;
     417        4084 :         link->sample_aspect_ratio = c->pixel_aspect;
     418             : 
     419        4084 :         if (c->hw_frames_ctx) {
     420           0 :             link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
     421           0 :             if (!link->hw_frames_ctx)
     422           0 :                 return AVERROR(ENOMEM);
     423             :         }
     424        4084 :         break;
     425        1059 :     case AVMEDIA_TYPE_AUDIO:
     426        1059 :         if (!c->channel_layout)
     427           2 :             c->channel_layout = link->channel_layout;
     428        1059 :         break;
     429           0 :     default:
     430           0 :         return AVERROR(EINVAL);
     431             :     }
     432             : 
     433        5143 :     link->time_base = c->time_base;
     434        5143 :     link->frame_rate = c->frame_rate;
     435        5143 :     return 0;
     436             : }
     437             : 
     438      724118 : static int request_frame(AVFilterLink *link)
     439             : {
     440      724118 :     BufferSourceContext *c = link->src->priv;
     441             :     AVFrame *frame;
     442             :     int ret;
     443             : 
     444      724118 :     if (!av_fifo_size(c->fifo)) {
     445      346452 :         if (c->eof)
     446           0 :             return AVERROR_EOF;
     447      346452 :         c->nb_failed_requests++;
     448      346452 :         return AVERROR(EAGAIN);
     449             :     }
     450      377666 :     av_fifo_generic_read(c->fifo, &frame, sizeof(frame), NULL);
     451             : 
     452      377666 :     ret = ff_filter_frame(link, frame);
     453             : 
     454      377666 :     return ret;
     455             : }
     456             : 
     457           0 : static int poll_frame(AVFilterLink *link)
     458             : {
     459           0 :     BufferSourceContext *c = link->src->priv;
     460           0 :     int size = av_fifo_size(c->fifo);
     461           0 :     if (!size && c->eof)
     462           0 :         return AVERROR_EOF;
     463           0 :     return size/sizeof(AVFrame*);
     464             : }
     465             : 
     466             : static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
     467             :     {
     468             :         .name          = "default",
     469             :         .type          = AVMEDIA_TYPE_VIDEO,
     470             :         .request_frame = request_frame,
     471             :         .poll_frame    = poll_frame,
     472             :         .config_props  = config_props,
     473             :     },
     474             :     { NULL }
     475             : };
     476             : 
     477             : AVFilter ff_vsrc_buffer = {
     478             :     .name      = "buffer",
     479             :     .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
     480             :     .priv_size = sizeof(BufferSourceContext),
     481             :     .query_formats = query_formats,
     482             : 
     483             :     .init      = init_video,
     484             :     .uninit    = uninit,
     485             : 
     486             :     .inputs    = NULL,
     487             :     .outputs   = avfilter_vsrc_buffer_outputs,
     488             :     .priv_class = &buffer_class,
     489             : };
     490             : 
     491             : static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
     492             :     {
     493             :         .name          = "default",
     494             :         .type          = AVMEDIA_TYPE_AUDIO,
     495             :         .request_frame = request_frame,
     496             :         .poll_frame    = poll_frame,
     497             :         .config_props  = config_props,
     498             :     },
     499             :     { NULL }
     500             : };
     501             : 
     502             : AVFilter ff_asrc_abuffer = {
     503             :     .name          = "abuffer",
     504             :     .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
     505             :     .priv_size     = sizeof(BufferSourceContext),
     506             :     .query_formats = query_formats,
     507             : 
     508             :     .init      = init_audio,
     509             :     .uninit    = uninit,
     510             : 
     511             :     .inputs    = NULL,
     512             :     .outputs   = avfilter_asrc_abuffer_outputs,
     513             :     .priv_class = &abuffer_class,
     514             : };

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