FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavdevice/lavfi.c	Lines:	215	274	78.5 %
Date:	2020-08-14 10:39:37	Branches:	115	170	67.6 %


/*
 * 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
 * libavfilter virtual input device
 */

/* #define DEBUG */

#include <float.h>              /* DBL_MIN, DBL_MAX */

#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/file.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/buffersink.h"
#include "libavformat/avio_internal.h"
#include "libavformat/internal.h"
#include "avdevice.h"

typedef struct {
    AVClass *class;          ///< class for private options
    char          *graph_str;
    char          *graph_filename;
    char          *dump_graph;
    AVFilterGraph *graph;
    AVFilterContext **sinks;
    int *sink_stream_map;
    int *sink_eof;
    int *stream_sink_map;
    int *sink_stream_subcc_map;
    AVFrame *decoded_frame;
    int nb_sinks;
    AVPacket subcc_packet;
} LavfiContext;

static int *create_all_formats(int n)
{
    int i, j, *fmts, count = 0;

    for (i = 0; i < n; i++) {
        const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
        if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
            count++;
    }

    if (!(fmts = av_malloc((count+1) * sizeof(int))))
        return NULL;
    for (j = 0, i = 0; i < n; i++) {
        const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
        if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
            fmts[j++] = i;
    }
    fmts[j] = -1;
    return fmts;
}

av_cold static int lavfi_read_close(AVFormatContext *avctx)
{
    LavfiContext *lavfi = avctx->priv_data;

    av_freep(&lavfi->sink_stream_map);
    av_freep(&lavfi->sink_eof);
    av_freep(&lavfi->stream_sink_map);
    av_freep(&lavfi->sink_stream_subcc_map);
    av_freep(&lavfi->sinks);
    avfilter_graph_free(&lavfi->graph);
    av_frame_free(&lavfi->decoded_frame);

    return 0;
}

static int create_subcc_streams(AVFormatContext *avctx)
{
    LavfiContext *lavfi = avctx->priv_data;
    AVStream *st;
    int stream_idx, sink_idx;

    for (stream_idx = 0; stream_idx < lavfi->nb_sinks; stream_idx++) {
        sink_idx = lavfi->stream_sink_map[stream_idx];
        if (lavfi->sink_stream_subcc_map[sink_idx]) {
            lavfi->sink_stream_subcc_map[sink_idx] = avctx->nb_streams;
            if (!(st = avformat_new_stream(avctx, NULL)))
                return AVERROR(ENOMEM);
            st->codecpar->codec_id = AV_CODEC_ID_EIA_608;
            st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
        } else {
            lavfi->sink_stream_subcc_map[sink_idx] = -1;
        }
    }
    return 0;
}

av_cold static int lavfi_read_header(AVFormatContext *avctx)
{
    LavfiContext *lavfi = avctx->priv_data;
    AVFilterInOut *input_links = NULL, *output_links = NULL, *inout;
    const AVFilter *buffersink, *abuffersink;
    int *pix_fmts = create_all_formats(AV_PIX_FMT_NB);
    enum AVMediaType type;
    int ret = 0, i, n;

#define FAIL(ERR) { ret = ERR; goto end; }

    if (!pix_fmts)
        FAIL(AVERROR(ENOMEM));

    buffersink = avfilter_get_by_name("buffersink");
    abuffersink = avfilter_get_by_name("abuffersink");

    if (lavfi->graph_filename && lavfi->graph_str) {
        av_log(avctx, AV_LOG_ERROR,
               "Only one of the graph or graph_file options must be specified\n");
        FAIL(AVERROR(EINVAL));
    }

    if (lavfi->graph_filename) {
        AVBPrint graph_file_pb;
        AVIOContext *avio = NULL;
        AVDictionary *options = NULL;
        if (avctx->protocol_whitelist && (ret = av_dict_set(&options, "protocol_whitelist", avctx->protocol_whitelist, 0)) < 0)
            goto end;
        ret = avio_open2(&avio, lavfi->graph_filename, AVIO_FLAG_READ, &avctx->interrupt_callback, &options);
        av_dict_set(&options, "protocol_whitelist", NULL, 0);
        if (ret < 0)
            goto end;
        av_bprint_init(&graph_file_pb, 0, AV_BPRINT_SIZE_UNLIMITED);
        ret = avio_read_to_bprint(avio, &graph_file_pb, INT_MAX);
        avio_closep(&avio);
        av_bprint_chars(&graph_file_pb, '\0', 1);
        if (!ret && !av_bprint_is_complete(&graph_file_pb))
            ret = AVERROR(ENOMEM);
        if (ret) {
            av_bprint_finalize(&graph_file_pb, NULL);
            goto end;
        }
        if ((ret = av_bprint_finalize(&graph_file_pb, &lavfi->graph_str)))
            goto end;
    }

    if (!lavfi->graph_str)
        lavfi->graph_str = av_strdup(avctx->url);

    /* parse the graph, create a stream for each open output */
    if (!(lavfi->graph = avfilter_graph_alloc()))
        FAIL(AVERROR(ENOMEM));

    if ((ret = avfilter_graph_parse_ptr(lavfi->graph, lavfi->graph_str,
                                    &input_links, &output_links, avctx)) < 0)
        goto end;

    if (input_links) {
        av_log(avctx, AV_LOG_ERROR,
               "Open inputs in the filtergraph are not acceptable\n");
        FAIL(AVERROR(EINVAL));
    }

    /* count the outputs */
    for (n = 0, inout = output_links; inout; n++, inout = inout->next);
    lavfi->nb_sinks = n;

    if (!(lavfi->sink_stream_map = av_malloc(sizeof(int) * n)))
        FAIL(AVERROR(ENOMEM));
    if (!(lavfi->sink_eof = av_mallocz(sizeof(int) * n)))
        FAIL(AVERROR(ENOMEM));
    if (!(lavfi->stream_sink_map = av_malloc(sizeof(int) * n)))
        FAIL(AVERROR(ENOMEM));
    if (!(lavfi->sink_stream_subcc_map = av_malloc(sizeof(int) * n)))
        FAIL(AVERROR(ENOMEM));

    for (i = 0; i < n; i++)
        lavfi->stream_sink_map[i] = -1;

    /* parse the output link names - they need to be of the form out0, out1, ...
     * create a mapping between them and the streams */
    for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
        int stream_idx = 0, suffix = 0, use_subcc = 0;
        sscanf(inout->name, "out%n%d%n", &suffix, &stream_idx, &suffix);
        if (!suffix) {
            av_log(avctx,  AV_LOG_ERROR,
                   "Invalid outpad name '%s'\n", inout->name);
            FAIL(AVERROR(EINVAL));
        }
        if (inout->name[suffix]) {
            if (!strcmp(inout->name + suffix, "+subcc")) {
                use_subcc = 1;
            } else {
                av_log(avctx,  AV_LOG_ERROR,
                       "Invalid outpad suffix '%s'\n", inout->name);
                FAIL(AVERROR(EINVAL));
            }
        }

        if ((unsigned)stream_idx >= n) {
            av_log(avctx, AV_LOG_ERROR,
                   "Invalid index was specified in output '%s', "
                   "must be a non-negative value < %d\n",
                   inout->name, n);
            FAIL(AVERROR(EINVAL));
        }

        if (lavfi->stream_sink_map[stream_idx] != -1) {
            av_log(avctx,  AV_LOG_ERROR,
                   "An output with stream index %d was already specified\n",
                   stream_idx);
            FAIL(AVERROR(EINVAL));
        }
        lavfi->sink_stream_map[i] = stream_idx;
        lavfi->stream_sink_map[stream_idx] = i;
        lavfi->sink_stream_subcc_map[i] = !!use_subcc;
    }

    /* for each open output create a corresponding stream */
    for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
        AVStream *st;
        if (!(st = avformat_new_stream(avctx, NULL)))
            FAIL(AVERROR(ENOMEM));
        st->id = i;
    }

    /* create a sink for each output and connect them to the graph */
    lavfi->sinks = av_malloc_array(lavfi->nb_sinks, sizeof(AVFilterContext *));
    if (!lavfi->sinks)
        FAIL(AVERROR(ENOMEM));

    for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
        AVFilterContext *sink;

        type = avfilter_pad_get_type(inout->filter_ctx->output_pads, inout->pad_idx);

        if (type == AVMEDIA_TYPE_VIDEO && ! buffersink ||
            type == AVMEDIA_TYPE_AUDIO && ! abuffersink) {
                av_log(avctx, AV_LOG_ERROR, "Missing required buffersink filter, aborting.\n");
                FAIL(AVERROR_FILTER_NOT_FOUND);
        }

        if (type == AVMEDIA_TYPE_VIDEO) {
            ret = avfilter_graph_create_filter(&sink, buffersink,
                                               inout->name, NULL,
                                               NULL, lavfi->graph);
            if (ret >= 0)
                ret = av_opt_set_int_list(sink, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
            if (ret < 0)
                goto end;
        } else if (type == AVMEDIA_TYPE_AUDIO) {
            enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_U8,
                                                  AV_SAMPLE_FMT_S16,
                                                  AV_SAMPLE_FMT_S32,
                                                  AV_SAMPLE_FMT_FLT,
                                                  AV_SAMPLE_FMT_DBL, -1 };

            ret = avfilter_graph_create_filter(&sink, abuffersink,
                                               inout->name, NULL,
                                               NULL, lavfi->graph);
            if (ret >= 0)
                ret = av_opt_set_int_list(sink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
            if (ret < 0)
                goto end;
            ret = av_opt_set_int(sink, "all_channel_counts", 1,
                                 AV_OPT_SEARCH_CHILDREN);
            if (ret < 0)
                goto end;
        } else {
            av_log(avctx,  AV_LOG_ERROR,
                   "Output '%s' is not a video or audio output, not yet supported\n", inout->name);
            FAIL(AVERROR(EINVAL));
        }

        lavfi->sinks[i] = sink;
        if ((ret = avfilter_link(inout->filter_ctx, inout->pad_idx, sink, 0)) < 0)
            goto end;
    }

    /* configure the graph */
    if ((ret = avfilter_graph_config(lavfi->graph, avctx)) < 0)
        goto end;

    if (lavfi->dump_graph) {
        char *dump = avfilter_graph_dump(lavfi->graph, lavfi->dump_graph);
        if (dump != NULL) {
            fputs(dump, stderr);
            fflush(stderr);
            av_free(dump);
        } else {
            FAIL(AVERROR(ENOMEM));
        }
    }

    /* fill each stream with the information in the corresponding sink */
    for (i = 0; i < lavfi->nb_sinks; i++) {
        AVFilterContext *sink = lavfi->sinks[lavfi->stream_sink_map[i]];
        AVRational time_base = av_buffersink_get_time_base(sink);
        AVStream *st = avctx->streams[i];
        st->codecpar->codec_type = av_buffersink_get_type(sink);
        avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
        if (av_buffersink_get_type(sink) == AVMEDIA_TYPE_VIDEO) {
            st->codecpar->codec_id   = AV_CODEC_ID_RAWVIDEO;
            st->codecpar->format     = av_buffersink_get_format(sink);
            st->codecpar->width      = av_buffersink_get_w(sink);
            st->codecpar->height     = av_buffersink_get_h(sink);
            st       ->sample_aspect_ratio =
            st->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(sink);
            avctx->probesize = FFMAX(avctx->probesize,
                                     av_buffersink_get_w(sink) * av_buffersink_get_h(sink) *
                                     av_get_padded_bits_per_pixel(av_pix_fmt_desc_get(av_buffersink_get_format(sink))) *
                                     30);
        } else if (av_buffersink_get_type(sink) == AVMEDIA_TYPE_AUDIO) {
            st->codecpar->codec_id    = av_get_pcm_codec(av_buffersink_get_format(sink), -1);
            st->codecpar->channels    = av_buffersink_get_channels(sink);
            st->codecpar->format      = av_buffersink_get_format(sink);
            st->codecpar->sample_rate = av_buffersink_get_sample_rate(sink);
            st->codecpar->channel_layout = av_buffersink_get_channel_layout(sink);
            if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
                av_log(avctx, AV_LOG_ERROR,
                       "Could not find PCM codec for sample format %s.\n",
                       av_get_sample_fmt_name(av_buffersink_get_format(sink)));
        }
    }

    if ((ret = create_subcc_streams(avctx)) < 0)
        goto end;

    if (!(lavfi->decoded_frame = av_frame_alloc()))
        FAIL(AVERROR(ENOMEM));

end:
    av_free(pix_fmts);
    avfilter_inout_free(&input_links);
    avfilter_inout_free(&output_links);
    if (ret < 0)
        lavfi_read_close(avctx);
    return ret;
}

static int create_subcc_packet(AVFormatContext *avctx, AVFrame *frame,
                               int sink_idx)
{
    LavfiContext *lavfi = avctx->priv_data;
    AVFrameSideData *sd;
    int stream_idx, i, ret;

    if ((stream_idx = lavfi->sink_stream_subcc_map[sink_idx]) < 0)
        return 0;
    for (i = 0; i < frame->nb_side_data; i++)
        if (frame->side_data[i]->type == AV_FRAME_DATA_A53_CC)
            break;
    if (i >= frame->nb_side_data)
        return 0;
    sd = frame->side_data[i];
    if ((ret = av_new_packet(&lavfi->subcc_packet, sd->size)) < 0)
        return ret;
    memcpy(lavfi->subcc_packet.data, sd->data, sd->size);
    lavfi->subcc_packet.stream_index = stream_idx;
    lavfi->subcc_packet.pts = frame->pts;
    lavfi->subcc_packet.pos = frame->pkt_pos;
    return 0;
}

static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
{
    LavfiContext *lavfi = avctx->priv_data;
    double min_pts = DBL_MAX;
    int stream_idx, min_pts_sink_idx = 0;
    AVFrame *frame = lavfi->decoded_frame;
    AVDictionary *frame_metadata;
    int ret, i;
    int size = 0;

    if (lavfi->subcc_packet.size) {
        *pkt = lavfi->subcc_packet;
        av_init_packet(&lavfi->subcc_packet);
        lavfi->subcc_packet.size = 0;
        lavfi->subcc_packet.data = NULL;
        return pkt->size;
    }

    /* iterate through all the graph sinks. Select the sink with the
     * minimum PTS */
    for (i = 0; i < lavfi->nb_sinks; i++) {
        AVRational tb = av_buffersink_get_time_base(lavfi->sinks[i]);
        double d;
        int ret;

        if (lavfi->sink_eof[i])
            continue;

        ret = av_buffersink_get_frame_flags(lavfi->sinks[i], frame,
                                            AV_BUFFERSINK_FLAG_PEEK);
        if (ret == AVERROR_EOF) {
            ff_dlog(avctx, "EOF sink_idx:%d\n", i);
            lavfi->sink_eof[i] = 1;
            continue;
        } else if (ret < 0)
            return ret;
        d = av_rescale_q_rnd(frame->pts, tb, AV_TIME_BASE_Q, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
        ff_dlog(avctx, "sink_idx:%d time:%f\n", i, d);
        av_frame_unref(frame);

        if (d < min_pts) {
            min_pts = d;
            min_pts_sink_idx = i;
        }
    }
    if (min_pts == DBL_MAX)
        return AVERROR_EOF;

    ff_dlog(avctx, "min_pts_sink_idx:%i\n", min_pts_sink_idx);

    av_buffersink_get_frame_flags(lavfi->sinks[min_pts_sink_idx], frame, 0);
    stream_idx = lavfi->sink_stream_map[min_pts_sink_idx];

    if (frame->width /* FIXME best way of testing a video */) {
        size = av_image_get_buffer_size(frame->format, frame->width, frame->height, 1);
        if ((ret = av_new_packet(pkt, size)) < 0)
            return ret;

        av_image_copy_to_buffer(pkt->data, size, (const uint8_t **)frame->data, frame->linesize,
                                frame->format, frame->width, frame->height, 1);
    } else if (frame->channels /* FIXME test audio */) {
        size = frame->nb_samples * av_get_bytes_per_sample(frame->format) *
                                   frame->channels;
        if ((ret = av_new_packet(pkt, size)) < 0)
            return ret;
        memcpy(pkt->data, frame->data[0], size);
    }

    frame_metadata = frame->metadata;
    if (frame_metadata) {
        uint8_t *metadata;
        AVDictionaryEntry *e = NULL;
        AVBPrint meta_buf;

        av_bprint_init(&meta_buf, 0, AV_BPRINT_SIZE_UNLIMITED);
        while ((e = av_dict_get(frame_metadata, "", e, AV_DICT_IGNORE_SUFFIX))) {
            av_bprintf(&meta_buf, "%s", e->key);
            av_bprint_chars(&meta_buf, '\0', 1);
            av_bprintf(&meta_buf, "%s", e->value);
            av_bprint_chars(&meta_buf, '\0', 1);
        }
        if (!av_bprint_is_complete(&meta_buf) ||
            !(metadata = av_packet_new_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA,
                                                 meta_buf.len))) {
            av_bprint_finalize(&meta_buf, NULL);
            return AVERROR(ENOMEM);
        }
        memcpy(metadata, meta_buf.str, meta_buf.len);
        av_bprint_finalize(&meta_buf, NULL);
    }

    if ((ret = create_subcc_packet(avctx, frame, min_pts_sink_idx)) < 0) {
        av_frame_unref(frame);
        av_packet_unref(pkt);
        return ret;
    }

    pkt->stream_index = stream_idx;
    pkt->pts = frame->pts;
    pkt->pos = frame->pkt_pos;
    pkt->size = size;
    av_frame_unref(frame);
    return size;
}

#define OFFSET(x) offsetof(LavfiContext, x)

#define DEC AV_OPT_FLAG_DECODING_PARAM

static const AVOption options[] = {
    { "graph",     "set libavfilter graph", OFFSET(graph_str),  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
    { "graph_file","set libavfilter graph filename", OFFSET(graph_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC},
    { "dumpgraph", "dump graph to stderr",  OFFSET(dump_graph), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
    { NULL },
};

static const AVClass lavfi_class = {
    .class_name = "lavfi indev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEVICE_INPUT,
};

AVInputFormat ff_lavfi_demuxer = {
    .name           = "lavfi",
    .long_name      = NULL_IF_CONFIG_SMALL("Libavfilter virtual input device"),
    .priv_data_size = sizeof(LavfiContext),
    .read_header    = lavfi_read_header,
    .read_packet    = lavfi_read_packet,
    .read_close     = lavfi_read_close,
    .flags          = AVFMT_NOFILE,
    .priv_class     = &lavfi_class,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2011 Stefano Sabatini
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			* libavfilter virtual input device
24			*/
25
26			/* #define DEBUG */
27
28			#include <float.h> /* DBL_MIN, DBL_MAX */
29
30			#include "libavutil/bprint.h"
31			#include "libavutil/channel_layout.h"
32			#include "libavutil/file.h"
33			#include "libavutil/imgutils.h"
34			#include "libavutil/internal.h"
35			#include "libavutil/log.h"
36			#include "libavutil/mem.h"
37			#include "libavutil/opt.h"
38			#include "libavutil/parseutils.h"
39			#include "libavutil/pixdesc.h"
40			#include "libavfilter/avfilter.h"
41			#include "libavfilter/buffersink.h"
42			#include "libavformat/avio_internal.h"
43			#include "libavformat/internal.h"
44			#include "avdevice.h"
45
46			typedef struct {
47			AVClass *class; ///< class for private options
48			char *graph_str;
49			char *graph_filename;
50			char *dump_graph;
51			AVFilterGraph *graph;
52			AVFilterContext **sinks;
53			int *sink_stream_map;
54			int *sink_eof;
55			int *stream_sink_map;
56			int *sink_stream_subcc_map;
57			AVFrame *decoded_frame;
58			int nb_sinks;
59			AVPacket subcc_packet;
60			} LavfiContext;
61
62		31	static int *create_all_formats(int n)
63			{
64		31	int i, j, *fmts, count = 0;
65
66	✓✓	6169	for (i = 0; i < n; i++) {
67		6138	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
68	✓✓	6138	if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
69		5642	count++;
70			}
71
72	✗✓	31	if (!(fmts = av_malloc((count+1) * sizeof(int))))
73			return NULL;
74	✓✓	6169	for (j = 0, i = 0; i < n; i++) {
75		6138	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
76	✓✓	6138	if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
77		5642	fmts[j++] = i;
78			}
79		31	fmts[j] = -1;
80		31	return fmts;
81			}
82
83		31	av_cold static int lavfi_read_close(AVFormatContext *avctx)
84			{
85		31	LavfiContext *lavfi = avctx->priv_data;
86
87		31	av_freep(&lavfi->sink_stream_map);
88		31	av_freep(&lavfi->sink_eof);
89		31	av_freep(&lavfi->stream_sink_map);
90		31	av_freep(&lavfi->sink_stream_subcc_map);
91		31	av_freep(&lavfi->sinks);
92		31	avfilter_graph_free(&lavfi->graph);
93		31	av_frame_free(&lavfi->decoded_frame);
94
95		31	return 0;
96			}
97
98		31	static int create_subcc_streams(AVFormatContext *avctx)
99			{
100		31	LavfiContext *lavfi = avctx->priv_data;
101			AVStream *st;
102			int stream_idx, sink_idx;
103
104	✓✓	64	for (stream_idx = 0; stream_idx < lavfi->nb_sinks; stream_idx++) {
105		33	sink_idx = lavfi->stream_sink_map[stream_idx];
106	✓✓	33	if (lavfi->sink_stream_subcc_map[sink_idx]) {
107		3	lavfi->sink_stream_subcc_map[sink_idx] = avctx->nb_streams;
108	✗✓	3	if (!(st = avformat_new_stream(avctx, NULL)))
109			return AVERROR(ENOMEM);
110		3	st->codecpar->codec_id = AV_CODEC_ID_EIA_608;
111		3	st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
112			} else {
113		30	lavfi->sink_stream_subcc_map[sink_idx] = -1;
114			}
115			}
116		31	return 0;
117			}
118
119		31	av_cold static int lavfi_read_header(AVFormatContext *avctx)
120			{
121		31	LavfiContext *lavfi = avctx->priv_data;
122		31	AVFilterInOut input_links = NULL, output_links = NULL, *inout;
123			const AVFilter buffersink, abuffersink;
124		31	int *pix_fmts = create_all_formats(AV_PIX_FMT_NB);
125			enum AVMediaType type;
126		31	int ret = 0, i, n;
127
128			#define FAIL(ERR) { ret = ERR; goto end; }
129
130	✗✓	31	if (!pix_fmts)
131			FAIL(AVERROR(ENOMEM));
132
133		31	buffersink = avfilter_get_by_name("buffersink");
134		31	abuffersink = avfilter_get_by_name("abuffersink");
135
136	✓✓✗✓	31	if (lavfi->graph_filename && lavfi->graph_str) {
137			av_log(avctx, AV_LOG_ERROR,
138			"Only one of the graph or graph_file options must be specified\n");
139			FAIL(AVERROR(EINVAL));
140			}
141
142	✓✓	31	if (lavfi->graph_filename) {
143			AVBPrint graph_file_pb;
144		1	AVIOContext *avio = NULL;
145		1	AVDictionary *options = NULL;
146	✗✓✗✗	1	if (avctx->protocol_whitelist && (ret = av_dict_set(&options, "protocol_whitelist", avctx->protocol_whitelist, 0)) < 0)
147			goto end;
148		1	ret = avio_open2(&avio, lavfi->graph_filename, AVIO_FLAG_READ, &avctx->interrupt_callback, &options);
149		1	av_dict_set(&options, "protocol_whitelist", NULL, 0);
150	✗✓	1	if (ret < 0)
151			goto end;
152		1	av_bprint_init(&graph_file_pb, 0, AV_BPRINT_SIZE_UNLIMITED);
153		1	ret = avio_read_to_bprint(avio, &graph_file_pb, INT_MAX);
154		1	avio_closep(&avio);
155		1	av_bprint_chars(&graph_file_pb, '\0', 1);
156	✓✗✗✓	1	if (!ret && !av_bprint_is_complete(&graph_file_pb))
157			ret = AVERROR(ENOMEM);
158	✗✓	1	if (ret) {
159			av_bprint_finalize(&graph_file_pb, NULL);
160			goto end;
161			}
162	✗✓	1	if ((ret = av_bprint_finalize(&graph_file_pb, &lavfi->graph_str)))
163			goto end;
164			}
165
166	✓✓	31	if (!lavfi->graph_str)
167		30	lavfi->graph_str = av_strdup(avctx->url);
168
169			/* parse the graph, create a stream for each open output */
170	✗✓	31	if (!(lavfi->graph = avfilter_graph_alloc()))
171			FAIL(AVERROR(ENOMEM));
172
173	✗✓	31	if ((ret = avfilter_graph_parse_ptr(lavfi->graph, lavfi->graph_str,
174			&input_links, &output_links, avctx)) < 0)
175			goto end;
176
177	✗✓	31	if (input_links) {
178			av_log(avctx, AV_LOG_ERROR,
179			"Open inputs in the filtergraph are not acceptable\n");
180			FAIL(AVERROR(EINVAL));
181			}
182
183			/* count the outputs */
184	✓✓	64	for (n = 0, inout = output_links; inout; n++, inout = inout->next);
185		31	lavfi->nb_sinks = n;
186
187	✗✓	31	if (!(lavfi->sink_stream_map = av_malloc(sizeof(int) * n)))
188			FAIL(AVERROR(ENOMEM));
189	✗✓	31	if (!(lavfi->sink_eof = av_mallocz(sizeof(int) * n)))
190			FAIL(AVERROR(ENOMEM));
191	✗✓	31	if (!(lavfi->stream_sink_map = av_malloc(sizeof(int) * n)))
192			FAIL(AVERROR(ENOMEM));
193	✗✓	31	if (!(lavfi->sink_stream_subcc_map = av_malloc(sizeof(int) * n)))
194			FAIL(AVERROR(ENOMEM));
195
196	✓✓	64	for (i = 0; i < n; i++)
197		33	lavfi->stream_sink_map[i] = -1;
198
199			/* parse the output link names - they need to be of the form out0, out1, ...
200			* create a mapping between them and the streams */
201	✓✓	64	for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
202		33	int stream_idx = 0, suffix = 0, use_subcc = 0;
203		33	sscanf(inout->name, "out%n%d%n", &suffix, &stream_idx, &suffix);
204	✗✓	33	if (!suffix) {
205			av_log(avctx, AV_LOG_ERROR,
206			"Invalid outpad name '%s'\n", inout->name);
207			FAIL(AVERROR(EINVAL));
208			}
209	✓✓	33	if (inout->name[suffix]) {
210	✓✗	3	if (!strcmp(inout->name + suffix, "+subcc")) {
211		3	use_subcc = 1;
212			} else {
213			av_log(avctx, AV_LOG_ERROR,
214			"Invalid outpad suffix '%s'\n", inout->name);
215			FAIL(AVERROR(EINVAL));
216			}
217			}
218
219	✗✓	33	if ((unsigned)stream_idx >= n) {
220			av_log(avctx, AV_LOG_ERROR,
221			"Invalid index was specified in output '%s', "
222			"must be a non-negative value < %d\n",
223			inout->name, n);
224			FAIL(AVERROR(EINVAL));
225			}
226
227	✗✓	33	if (lavfi->stream_sink_map[stream_idx] != -1) {
228			av_log(avctx, AV_LOG_ERROR,
229			"An output with stream index %d was already specified\n",
230			stream_idx);
231			FAIL(AVERROR(EINVAL));
232			}
233		33	lavfi->sink_stream_map[i] = stream_idx;
234		33	lavfi->stream_sink_map[stream_idx] = i;
235		33	lavfi->sink_stream_subcc_map[i] = !!use_subcc;
236			}
237
238			/* for each open output create a corresponding stream */
239	✓✓	64	for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
240			AVStream *st;
241	✗✓	33	if (!(st = avformat_new_stream(avctx, NULL)))
242			FAIL(AVERROR(ENOMEM));
243		33	st->id = i;
244			}
245
246			/* create a sink for each output and connect them to the graph */
247		31	lavfi->sinks = av_malloc_array(lavfi->nb_sinks, sizeof(AVFilterContext *));
248	✗✓	31	if (!lavfi->sinks)
249			FAIL(AVERROR(ENOMEM));
250
251	✓✓	64	for (i = 0, inout = output_links; inout; i++, inout = inout->next) {
252			AVFilterContext *sink;
253
254		33	type = avfilter_pad_get_type(inout->filter_ctx->output_pads, inout->pad_idx);
255
256	✓✓✓✗ ✓✓	33	if (type == AVMEDIA_TYPE_VIDEO && ! buffersink \|\|
257	✗✓	16	type == AVMEDIA_TYPE_AUDIO && ! abuffersink) {
258			av_log(avctx, AV_LOG_ERROR, "Missing required buffersink filter, aborting.\n");
259			FAIL(AVERROR_FILTER_NOT_FOUND);
260			}
261
262	✓✓	33	if (type == AVMEDIA_TYPE_VIDEO) {
263		17	ret = avfilter_graph_create_filter(&sink, buffersink,
264		17	inout->name, NULL,
265			NULL, lavfi->graph);
266	✓✗	17	if (ret >= 0)
267	✓✗	17	ret = av_opt_set_int_list(sink, "pix_fmts", pix_fmts, AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
268	✗✓	17	if (ret < 0)
269			goto end;
270	✓✗	16	} else if (type == AVMEDIA_TYPE_AUDIO) {
271		16	enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_U8,
272			AV_SAMPLE_FMT_S16,
273			AV_SAMPLE_FMT_S32,
274			AV_SAMPLE_FMT_FLT,
275			AV_SAMPLE_FMT_DBL, -1 };
276
277		16	ret = avfilter_graph_create_filter(&sink, abuffersink,
278		16	inout->name, NULL,
279			NULL, lavfi->graph);
280	✓✗	16	if (ret >= 0)
281	✓✗	16	ret = av_opt_set_int_list(sink, "sample_fmts", sample_fmts, AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
282	✗✓	16	if (ret < 0)
283			goto end;
284		16	ret = av_opt_set_int(sink, "all_channel_counts", 1,
285			AV_OPT_SEARCH_CHILDREN);
286	✗✓	16	if (ret < 0)
287			goto end;
288			} else {
289			av_log(avctx, AV_LOG_ERROR,
290			"Output '%s' is not a video or audio output, not yet supported\n", inout->name);
291			FAIL(AVERROR(EINVAL));
292			}
293
294		33	lavfi->sinks[i] = sink;
295	✗✓	33	if ((ret = avfilter_link(inout->filter_ctx, inout->pad_idx, sink, 0)) < 0)
296			goto end;
297			}
298
299			/* configure the graph */
300	✗✓	31	if ((ret = avfilter_graph_config(lavfi->graph, avctx)) < 0)
301			goto end;
302
303	✗✓	31	if (lavfi->dump_graph) {
304			char *dump = avfilter_graph_dump(lavfi->graph, lavfi->dump_graph);
305			if (dump != NULL) {
306			fputs(dump, stderr);
307			fflush(stderr);
308			av_free(dump);
309			} else {
310			FAIL(AVERROR(ENOMEM));
311			}
312			}
313
314			/* fill each stream with the information in the corresponding sink */
315	✓✓	64	for (i = 0; i < lavfi->nb_sinks; i++) {
316		33	AVFilterContext *sink = lavfi->sinks[lavfi->stream_sink_map[i]];
317		33	AVRational time_base = av_buffersink_get_time_base(sink);
318		33	AVStream *st = avctx->streams[i];
319		33	st->codecpar->codec_type = av_buffersink_get_type(sink);
320		33	avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
321	✓✓	33	if (av_buffersink_get_type(sink) == AVMEDIA_TYPE_VIDEO) {
322		17	st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
323		17	st->codecpar->format = av_buffersink_get_format(sink);
324		17	st->codecpar->width = av_buffersink_get_w(sink);
325		17	st->codecpar->height = av_buffersink_get_h(sink);
326		17	st ->sample_aspect_ratio =
327		17	st->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(sink);
328	✓✓	17	avctx->probesize = FFMAX(avctx->probesize,
329			av_buffersink_get_w(sink) * av_buffersink_get_h(sink) *
330			av_get_padded_bits_per_pixel(av_pix_fmt_desc_get(av_buffersink_get_format(sink))) *
331			30);
332	✓✗	16	} else if (av_buffersink_get_type(sink) == AVMEDIA_TYPE_AUDIO) {
333		16	st->codecpar->codec_id = av_get_pcm_codec(av_buffersink_get_format(sink), -1);
334		16	st->codecpar->channels = av_buffersink_get_channels(sink);
335		16	st->codecpar->format = av_buffersink_get_format(sink);
336		16	st->codecpar->sample_rate = av_buffersink_get_sample_rate(sink);
337		16	st->codecpar->channel_layout = av_buffersink_get_channel_layout(sink);
338	✗✓	16	if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
339			av_log(avctx, AV_LOG_ERROR,
340			"Could not find PCM codec for sample format %s.\n",
341			av_get_sample_fmt_name(av_buffersink_get_format(sink)));
342			}
343			}
344
345	✗✓	31	if ((ret = create_subcc_streams(avctx)) < 0)
346			goto end;
347
348	✓✗	31	if (!(lavfi->decoded_frame = av_frame_alloc()))
349			FAIL(AVERROR(ENOMEM));
350
351		31	end:
352		31	av_free(pix_fmts);
353		31	avfilter_inout_free(&input_links);
354		31	avfilter_inout_free(&output_links);
355	✗✓	31	if (ret < 0)
356			lavfi_read_close(avctx);
357		31	return ret;
358			}
359
360		9832	static int create_subcc_packet(AVFormatContext avctx, AVFrame frame,
361			int sink_idx)
362			{
363		9832	LavfiContext *lavfi = avctx->priv_data;
364			AVFrameSideData *sd;
365			int stream_idx, i, ret;
366
367	✓✓	9832	if ((stream_idx = lavfi->sink_stream_subcc_map[sink_idx]) < 0)
368		9360	return 0;
369	✓✗	944	for (i = 0; i < frame->nb_side_data; i++)
370	✓✓	944	if (frame->side_data[i]->type == AV_FRAME_DATA_A53_CC)
371		472	break;
372	✗✓	472	if (i >= frame->nb_side_data)
373			return 0;
374		472	sd = frame->side_data[i];
375	✗✓	472	if ((ret = av_new_packet(&lavfi->subcc_packet, sd->size)) < 0)
376			return ret;
377		472	memcpy(lavfi->subcc_packet.data, sd->data, sd->size);
378		472	lavfi->subcc_packet.stream_index = stream_idx;
379		472	lavfi->subcc_packet.pts = frame->pts;
380		472	lavfi->subcc_packet.pos = frame->pkt_pos;
381		472	return 0;
382			}
383
384		10339	static int lavfi_read_packet(AVFormatContext avctx, AVPacket pkt)
385			{
386		10339	LavfiContext *lavfi = avctx->priv_data;
387		10339	double min_pts = DBL_MAX;
388		10339	int stream_idx, min_pts_sink_idx = 0;
389		10339	AVFrame *frame = lavfi->decoded_frame;
390			AVDictionary *frame_metadata;
391			int ret, i;
392		10339	int size = 0;
393
394	✓✓	10339	if (lavfi->subcc_packet.size) {
395		472	*pkt = lavfi->subcc_packet;
396		472	av_init_packet(&lavfi->subcc_packet);
397		472	lavfi->subcc_packet.size = 0;
398		472	lavfi->subcc_packet.data = NULL;
399		472	return pkt->size;
400			}
401
402			/* iterate through all the graph sinks. Select the sink with the
403			* minimum PTS */
404	✓✓	19764	for (i = 0; i < lavfi->nb_sinks; i++) {
405		9897	AVRational tb = av_buffersink_get_time_base(lavfi->sinks[i]);
406			double d;
407			int ret;
408
409	✓✓	9897	if (lavfi->sink_eof[i])
410		40	continue;
411
412		9889	ret = av_buffersink_get_frame_flags(lavfi->sinks[i], frame,
413			AV_BUFFERSINK_FLAG_PEEK);
414	✓✓	9889	if (ret == AVERROR_EOF) {
415			ff_dlog(avctx, "EOF sink_idx:%d\n", i);
416		32	lavfi->sink_eof[i] = 1;
417		32	continue;
418	✗✓	9857	} else if (ret < 0)
419			return ret;
420		9857	d = av_rescale_q_rnd(frame->pts, tb, AV_TIME_BASE_Q, AV_ROUND_NEAR_INF\|AV_ROUND_PASS_MINMAX);
421			ff_dlog(avctx, "sink_idx:%d time:%f\n", i, d);
422		9857	av_frame_unref(frame);
423
424	✓✓	9857	if (d < min_pts) {
425		9841	min_pts = d;
426		9841	min_pts_sink_idx = i;
427			}
428			}
429	✓✓	9867	if (min_pts == DBL_MAX)
430		35	return AVERROR_EOF;
431
432			ff_dlog(avctx, "min_pts_sink_idx:%i\n", min_pts_sink_idx);
433
434		9832	av_buffersink_get_frame_flags(lavfi->sinks[min_pts_sink_idx], frame, 0);
435		9832	stream_idx = lavfi->sink_stream_map[min_pts_sink_idx];
436
437	✓✓	9832	if (frame->width /* FIXME best way of testing a video */) {
438		1028	size = av_image_get_buffer_size(frame->format, frame->width, frame->height, 1);
439	✗✓	1028	if ((ret = av_new_packet(pkt, size)) < 0)
440			return ret;
441
442		1028	av_image_copy_to_buffer(pkt->data, size, (const uint8_t **)frame->data, frame->linesize,
443		1028	frame->format, frame->width, frame->height, 1);
444	✓✗	8804	} else if (frame->channels /* FIXME test audio */) {
445		8804	size = frame->nb_samples * av_get_bytes_per_sample(frame->format) *
446		8804	frame->channels;
447	✗✓	8804	if ((ret = av_new_packet(pkt, size)) < 0)
448			return ret;
449		8804	memcpy(pkt->data, frame->data[0], size);
450			}
451
452		9832	frame_metadata = frame->metadata;
453	✓✓	9832	if (frame_metadata) {
454			uint8_t *metadata;
455		430	AVDictionaryEntry *e = NULL;
456			AVBPrint meta_buf;
457
458		430	av_bprint_init(&meta_buf, 0, AV_BPRINT_SIZE_UNLIMITED);
459	✓✓	2557	while ((e = av_dict_get(frame_metadata, "", e, AV_DICT_IGNORE_SUFFIX))) {
460		2127	av_bprintf(&meta_buf, "%s", e->key);
461		2127	av_bprint_chars(&meta_buf, '\0', 1);
462		2127	av_bprintf(&meta_buf, "%s", e->value);
463		2127	av_bprint_chars(&meta_buf, '\0', 1);
464			}
465	✓✗✗✓	860	if (!av_bprint_is_complete(&meta_buf) \|\|
466		430	!(metadata = av_packet_new_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA,
467		430	meta_buf.len))) {
468			av_bprint_finalize(&meta_buf, NULL);
469			return AVERROR(ENOMEM);
470			}
471		430	memcpy(metadata, meta_buf.str, meta_buf.len);
472		430	av_bprint_finalize(&meta_buf, NULL);
473			}
474
475	✗✓	9832	if ((ret = create_subcc_packet(avctx, frame, min_pts_sink_idx)) < 0) {
476			av_frame_unref(frame);
477			av_packet_unref(pkt);
478			return ret;
479			}
480
481		9832	pkt->stream_index = stream_idx;
482		9832	pkt->pts = frame->pts;
483		9832	pkt->pos = frame->pkt_pos;
484		9832	pkt->size = size;
485		9832	av_frame_unref(frame);
486		9832	return size;
487			}
488
489			#define OFFSET(x) offsetof(LavfiContext, x)
490
491			#define DEC AV_OPT_FLAG_DECODING_PARAM
492
493			static const AVOption options[] = {
494			{ "graph", "set libavfilter graph", OFFSET(graph_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
495			{ "graph_file","set libavfilter graph filename", OFFSET(graph_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC},
496			{ "dumpgraph", "dump graph to stderr", OFFSET(dump_graph), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
497			{ NULL },
498			};
499
500			static const AVClass lavfi_class = {
501			.class_name = "lavfi indev",
502			.item_name = av_default_item_name,
503			.option = options,
504			.version = LIBAVUTIL_VERSION_INT,
505			.category = AV_CLASS_CATEGORY_DEVICE_INPUT,
506			};
507
508			AVInputFormat ff_lavfi_demuxer = {
509			.name = "lavfi",
510			.long_name = NULL_IF_CONFIG_SMALL("Libavfilter virtual input device"),
511			.priv_data_size = sizeof(LavfiContext),
512			.read_header = lavfi_read_header,
513			.read_packet = lavfi_read_packet,
514			.read_close = lavfi_read_close,
515			.flags = AVFMT_NOFILE,
516			.priv_class = &lavfi_class,
517			};