FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/bsf.c	Lines:	89	286	31.1 %
Date:	2020-04-02 05:41:20	Branches:	49	162	30.2 %


/*
 * 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
 */

#include <string.h>

#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"

#include "avcodec.h"
#include "bsf.h"

struct AVBSFInternal {
    AVPacket *buffer_pkt;
    int eof;
};

void av_bsf_free(AVBSFContext **pctx)
{
    AVBSFContext *ctx;

    if (!pctx || !*pctx)
        return;
    ctx = *pctx;

    if (ctx->filter->close)
        ctx->filter->close(ctx);
    if (ctx->filter->priv_class && ctx->priv_data)
        av_opt_free(ctx->priv_data);

    if (ctx->internal)
        av_packet_free(&ctx->internal->buffer_pkt);
    av_freep(&ctx->internal);
    av_freep(&ctx->priv_data);

    avcodec_parameters_free(&ctx->par_in);
    avcodec_parameters_free(&ctx->par_out);

    av_freep(pctx);
}

static void *bsf_child_next(void *obj, void *prev)
{
    AVBSFContext *ctx = obj;
    if (!prev && ctx->filter->priv_class)
        return ctx->priv_data;
    return NULL;
}

static const char *bsf_to_name(void *bsf)
{
    return ((AVBSFContext *)bsf)->filter->name;
}

static const AVClass bsf_class = {
    .class_name       = "AVBSFContext",
    .item_name        = bsf_to_name,
    .version          = LIBAVUTIL_VERSION_INT,
    .child_next       = bsf_child_next,
    .child_class_next = ff_bsf_child_class_next,
    .category         = AV_CLASS_CATEGORY_BITSTREAM_FILTER,
};

const AVClass *av_bsf_get_class(void)
{
    return &bsf_class;
}

int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
{
    AVBSFContext *ctx;
    AVBSFInternal *bsfi;
    int ret;

    ctx = av_mallocz(sizeof(*ctx));
    if (!ctx)
        return AVERROR(ENOMEM);

    ctx->av_class = &bsf_class;
    ctx->filter   = filter;

    ctx->par_in  = avcodec_parameters_alloc();
    ctx->par_out = avcodec_parameters_alloc();
    if (!ctx->par_in || !ctx->par_out) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }

    bsfi = av_mallocz(sizeof(*bsfi));
    if (!bsfi) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }
    ctx->internal = bsfi;

    bsfi->buffer_pkt = av_packet_alloc();
    if (!bsfi->buffer_pkt) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }

    /* allocate priv data and init private options */
    if (filter->priv_data_size) {
        ctx->priv_data = av_mallocz(filter->priv_data_size);
        if (!ctx->priv_data) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }
        if (filter->priv_class) {
            *(const AVClass **)ctx->priv_data = filter->priv_class;
            av_opt_set_defaults(ctx->priv_data);
        }
    }

    *pctx = ctx;
    return 0;
fail:
    av_bsf_free(&ctx);
    return ret;
}

int av_bsf_init(AVBSFContext *ctx)
{
    int ret, i;

    /* check that the codec is supported */
    if (ctx->filter->codec_ids) {
        for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++)
            if (ctx->par_in->codec_id == ctx->filter->codec_ids[i])
                break;
        if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) {
            const AVCodecDescriptor *desc = avcodec_descriptor_get(ctx->par_in->codec_id);
            av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the "
                   "bitstream filter '%s'. Supported codecs are: ",
                   desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name);
            for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) {
                desc = avcodec_descriptor_get(ctx->filter->codec_ids[i]);
                av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
                       desc ? desc->name : "unknown", ctx->filter->codec_ids[i]);
            }
            av_log(ctx, AV_LOG_ERROR, "\n");
            return AVERROR(EINVAL);
        }
    }

    /* initialize output parameters to be the same as input
     * init below might overwrite that */
    ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in);
    if (ret < 0)
        return ret;

    ctx->time_base_out = ctx->time_base_in;

    if (ctx->filter->init) {
        ret = ctx->filter->init(ctx);
        if (ret < 0)
            return ret;
    }

    return 0;
}

void av_bsf_flush(AVBSFContext *ctx)
{
    AVBSFInternal *bsfi = ctx->internal;

    bsfi->eof = 0;

    av_packet_unref(bsfi->buffer_pkt);

    if (ctx->filter->flush)
        ctx->filter->flush(ctx);
}

int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
{
    AVBSFInternal *bsfi = ctx->internal;
    int ret;

    if (!pkt || (!pkt->data && !pkt->side_data_elems)) {
        bsfi->eof = 1;
        return 0;
    }

    if (bsfi->eof) {
        av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
        return AVERROR(EINVAL);
    }

    if (bsfi->buffer_pkt->data ||
        bsfi->buffer_pkt->side_data_elems)
        return AVERROR(EAGAIN);

    ret = av_packet_make_refcounted(pkt);
    if (ret < 0)
        return ret;
    av_packet_move_ref(bsfi->buffer_pkt, pkt);

    return 0;
}

int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
{
    return ctx->filter->filter(ctx, pkt);
}

int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
{
    AVBSFInternal *bsfi = ctx->internal;
    AVPacket *tmp_pkt;

    if (bsfi->eof)
        return AVERROR_EOF;

    if (!bsfi->buffer_pkt->data &&
        !bsfi->buffer_pkt->side_data_elems)
        return AVERROR(EAGAIN);

    tmp_pkt = av_packet_alloc();
    if (!tmp_pkt)
        return AVERROR(ENOMEM);

    *pkt = bsfi->buffer_pkt;
    bsfi->buffer_pkt = tmp_pkt;

    return 0;
}

int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
{
    AVBSFInternal *bsfi = ctx->internal;

    if (bsfi->eof)
        return AVERROR_EOF;

    if (!bsfi->buffer_pkt->data &&
        !bsfi->buffer_pkt->side_data_elems)
        return AVERROR(EAGAIN);

    av_packet_move_ref(pkt, bsfi->buffer_pkt);

    return 0;
}

typedef struct BSFListContext {
    const AVClass *class;

    AVBSFContext **bsfs;
    int nb_bsfs;

    unsigned idx;           // index of currently processed BSF
    unsigned flushed_idx;   // index of BSF being flushed

    char * item_name;
} BSFListContext;


static int bsf_list_init(AVBSFContext *bsf)
{
    BSFListContext *lst = bsf->priv_data;
    int ret, i;
    const AVCodecParameters *cod_par = bsf->par_in;
    AVRational tb = bsf->time_base_in;

    for (i = 0; i < lst->nb_bsfs; ++i) {
        ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par);
        if (ret < 0)
            goto fail;

        lst->bsfs[i]->time_base_in = tb;

        ret = av_bsf_init(lst->bsfs[i]);
        if (ret < 0)
            goto fail;

        cod_par = lst->bsfs[i]->par_out;
        tb = lst->bsfs[i]->time_base_out;
    }

    bsf->time_base_out = tb;
    ret = avcodec_parameters_copy(bsf->par_out, cod_par);

fail:
    return ret;
}

static int bsf_list_filter(AVBSFContext *bsf, AVPacket *out)
{
    BSFListContext *lst = bsf->priv_data;
    int ret;

    if (!lst->nb_bsfs)
        return ff_bsf_get_packet_ref(bsf, out);

    while (1) {
        if (lst->idx > lst->flushed_idx) {
            ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
            if (ret == AVERROR(EAGAIN)) {
                /* no more packets from idx-1, try with previous */
                lst->idx--;
                continue;
            } else if (ret == AVERROR_EOF) {
                /* filter idx-1 is done, continue with idx...nb_bsfs */
                lst->flushed_idx = lst->idx;
                continue;
            }else if (ret < 0) {
                /* filtering error */
                break;
            }
        } else {
            ret = ff_bsf_get_packet_ref(bsf, out);
            if (ret == AVERROR_EOF) {
                lst->idx = lst->flushed_idx;
            } else if (ret < 0)
                break;
        }

        if (lst->idx < lst->nb_bsfs) {
            AVPacket *pkt;
            if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
                /* ff_bsf_get_packet_ref returned EOF and idx is first
                 * filter of yet not flushed filter chain */
                pkt = NULL;
            } else {
                pkt = out;
            }
            ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
            if (ret < 0)
                break;
            lst->idx++;
        } else {
            /* The end of filter chain, break to return result */
            break;
        }
    }

    if (ret < 0)
        av_packet_unref(out);

    return ret;
}

static void bsf_list_flush(AVBSFContext *bsf)
{
    BSFListContext *lst = bsf->priv_data;

    for (int i = 0; i < lst->nb_bsfs; i++)
        av_bsf_flush(lst->bsfs[i]);
    lst->idx = lst->flushed_idx = 0;
}

static void bsf_list_close(AVBSFContext *bsf)
{
    BSFListContext *lst = bsf->priv_data;
    int i;

    for (i = 0; i < lst->nb_bsfs; ++i)
        av_bsf_free(&lst->bsfs[i]);
    av_freep(&lst->bsfs);
    av_freep(&lst->item_name);
}

static const char *bsf_list_item_name(void *ctx)
{
    static const char *null_filter_name = "null";
    AVBSFContext *bsf_ctx = ctx;
    BSFListContext *lst = bsf_ctx->priv_data;

    if (!lst->nb_bsfs)
        return null_filter_name;

    if (!lst->item_name) {
        int i;
        AVBPrint bp;
        av_bprint_init(&bp, 16, 128);

        av_bprintf(&bp, "bsf_list(");
        for (i = 0; i < lst->nb_bsfs; i++)
            av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name);
        av_bprintf(&bp, ")");

        av_bprint_finalize(&bp, &lst->item_name);
    }

    return lst->item_name;
}

static const AVClass bsf_list_class = {
        .class_name = "bsf_list",
        .item_name  = bsf_list_item_name,
        .version    = LIBAVUTIL_VERSION_INT,
};

const AVBitStreamFilter ff_list_bsf = {
        .name           = "bsf_list",
        .priv_data_size = sizeof(BSFListContext),
        .priv_class     = &bsf_list_class,
        .init           = bsf_list_init,
        .filter         = bsf_list_filter,
        .flush          = bsf_list_flush,
        .close          = bsf_list_close,
};

struct AVBSFList {
    AVBSFContext **bsfs;
    int nb_bsfs;
};

AVBSFList *av_bsf_list_alloc(void)
{
    return av_mallocz(sizeof(AVBSFList));
}

void av_bsf_list_free(AVBSFList **lst)
{
    int i;

    if (!*lst)
        return;

    for (i = 0; i < (*lst)->nb_bsfs; ++i)
        av_bsf_free(&(*lst)->bsfs[i]);
    av_free((*lst)->bsfs);
    av_freep(lst);
}

int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf)
{
    return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf);
}

int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary ** options)
{
    int ret;
    const AVBitStreamFilter *filter;
    AVBSFContext *bsf;

    filter = av_bsf_get_by_name(bsf_name);
    if (!filter)
        return AVERROR_BSF_NOT_FOUND;

    ret = av_bsf_alloc(filter, &bsf);
    if (ret < 0)
        return ret;

    if (options) {
        ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN);
        if (ret < 0)
            goto end;
    }

    ret = av_bsf_list_append(lst, bsf);

end:
    if (ret < 0)
        av_bsf_free(&bsf);

    return ret;
}

int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf)
{
    int ret = 0;
    BSFListContext *ctx;

    if ((*lst)->nb_bsfs == 1) {
        *bsf = (*lst)->bsfs[0];
        av_freep(&(*lst)->bsfs);
        (*lst)->nb_bsfs = 0;
        goto end;
    }

    ret = av_bsf_alloc(&ff_list_bsf, bsf);
    if (ret < 0)
        return ret;

    ctx = (*bsf)->priv_data;

    ctx->bsfs = (*lst)->bsfs;
    ctx->nb_bsfs = (*lst)->nb_bsfs;

end:
    av_freep(lst);
    return ret;
}

static int bsf_parse_single(const char *str, AVBSFList *bsf_lst)
{
    char *bsf_name, *bsf_options_str, *buf;
    AVDictionary *bsf_options = NULL;
    int ret = 0;

    if (!(buf = av_strdup(str)))
        return AVERROR(ENOMEM);

    bsf_name = av_strtok(buf, "=", &bsf_options_str);
    if (!bsf_name) {
        ret = AVERROR(EINVAL);
        goto end;
    }

    if (bsf_options_str) {
        ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
        if (ret < 0)
            goto end;
    }

    ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options);

end:
    av_dict_free(&bsf_options);
    av_free(buf);
    return ret;
}

int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
{
    AVBSFList *lst;
    char *bsf_str, *buf, *dup, *saveptr;
    int ret;

    if (!str)
        return av_bsf_get_null_filter(bsf_lst);

    lst = av_bsf_list_alloc();
    if (!lst)
        return AVERROR(ENOMEM);

    if (!(dup = buf = av_strdup(str))) {
        ret = AVERROR(ENOMEM);
        goto end;
    }

    while (1) {
        bsf_str = av_strtok(buf, ",", &saveptr);
        if (!bsf_str)
            break;

        ret = bsf_parse_single(bsf_str, lst);
        if (ret < 0)
            goto end;

        buf = NULL;
    }

    ret = av_bsf_list_finalize(&lst, bsf_lst);
end:
    if (ret < 0)
        av_bsf_list_free(&lst);
    av_free(dup);
    return ret;
}

int av_bsf_get_null_filter(AVBSFContext **bsf)
{
    return av_bsf_alloc(&ff_list_bsf, bsf);
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* This file is part of FFmpeg.
3			*
4			* FFmpeg is free software; you can redistribute it and/or
5			* modify it under the terms of the GNU Lesser General Public
6			* License as published by the Free Software Foundation; either
7			* version 2.1 of the License, or (at your option) any later version.
8			*
9			* FFmpeg is distributed in the hope that it will be useful,
10			* but WITHOUT ANY WARRANTY; without even the implied warranty of
11			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12			* Lesser General Public License for more details.
13			*
14			* You should have received a copy of the GNU Lesser General Public
15			* License along with FFmpeg; if not, write to the Free Software
16			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17			*/
18
19			#include <string.h>
20
21			#include "libavutil/log.h"
22			#include "libavutil/mem.h"
23			#include "libavutil/opt.h"
24			#include "libavutil/avstring.h"
25			#include "libavutil/bprint.h"
26
27			#include "avcodec.h"
28			#include "bsf.h"
29
30			struct AVBSFInternal {
31			AVPacket *buffer_pkt;
32			int eof;
33			};
34
35		31884	void av_bsf_free(AVBSFContext **pctx)
36			{
37			AVBSFContext *ctx;
38
39	✓✗✓✓	31884	if (!pctx \|\| !*pctx)
40		18699	return;
41		13185	ctx = *pctx;
42
43	✓✓	13185	if (ctx->filter->close)
44		1225	ctx->filter->close(ctx);
45	✓✓✓✗	13185	if (ctx->filter->priv_class && ctx->priv_data)
46		748	av_opt_free(ctx->priv_data);
47
48	✓✗	13185	if (ctx->internal)
49		13185	av_packet_free(&ctx->internal->buffer_pkt);
50		13185	av_freep(&ctx->internal);
51		13185	av_freep(&ctx->priv_data);
52
53		13185	avcodec_parameters_free(&ctx->par_in);
54		13185	avcodec_parameters_free(&ctx->par_out);
55
56		13185	av_freep(pctx);
57			}
58
59			static void bsf_child_next(void obj, void *prev)
60			{
61			AVBSFContext *ctx = obj;
62			if (!prev && ctx->filter->priv_class)
63			return ctx->priv_data;
64			return NULL;
65			}
66
67			static const char bsf_to_name(void bsf)
68			{
69			return ((AVBSFContext *)bsf)->filter->name;
70			}
71
72			static const AVClass bsf_class = {
73			.class_name = "AVBSFContext",
74			.item_name = bsf_to_name,
75			.version = LIBAVUTIL_VERSION_INT,
76			.child_next = bsf_child_next,
77			.child_class_next = ff_bsf_child_class_next,
78			.category = AV_CLASS_CATEGORY_BITSTREAM_FILTER,
79			};
80
81			const AVClass *av_bsf_get_class(void)
82			{
83			return &bsf_class;
84			}
85
86		13185	int av_bsf_alloc(const AVBitStreamFilter filter, AVBSFContext *pctx)
87			{
88			AVBSFContext *ctx;
89			AVBSFInternal *bsfi;
90			int ret;
91
92		13185	ctx = av_mallocz(sizeof(*ctx));
93	✗✓	13185	if (!ctx)
94			return AVERROR(ENOMEM);
95
96		13185	ctx->av_class = &bsf_class;
97		13185	ctx->filter = filter;
98
99		13185	ctx->par_in = avcodec_parameters_alloc();
100		13185	ctx->par_out = avcodec_parameters_alloc();
101	✓✗✗✓	13185	if (!ctx->par_in \|\| !ctx->par_out) {
102			ret = AVERROR(ENOMEM);
103			goto fail;
104			}
105
106		13185	bsfi = av_mallocz(sizeof(*bsfi));
107	✗✓	13185	if (!bsfi) {
108			ret = AVERROR(ENOMEM);
109			goto fail;
110			}
111		13185	ctx->internal = bsfi;
112
113		13185	bsfi->buffer_pkt = av_packet_alloc();
114	✗✓	13185	if (!bsfi->buffer_pkt) {
115			ret = AVERROR(ENOMEM);
116			goto fail;
117			}
118
119			/* allocate priv data and init private options */
120	✓✓	13185	if (filter->priv_data_size) {
121		1240	ctx->priv_data = av_mallocz(filter->priv_data_size);
122	✗✓	1240	if (!ctx->priv_data) {
123			ret = AVERROR(ENOMEM);
124			goto fail;
125			}
126	✓✓	1240	if (filter->priv_class) {
127		748	(const AVClass *)ctx->priv_data = filter->priv_class;
128		748	av_opt_set_defaults(ctx->priv_data);
129			}
130			}
131
132		13185	*pctx = ctx;
133		13185	return 0;
134			fail:
135			av_bsf_free(&ctx);
136			return ret;
137			}
138
139		13185	int av_bsf_init(AVBSFContext *ctx)
140			{
141			int ret, i;
142
143			/* check that the codec is supported */
144	✓✓	13185	if (ctx->filter->codec_ids) {
145	✓✗	4161	for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++)
146	✓✓	4161	if (ctx->par_in->codec_id == ctx->filter->codec_ids[i])
147		1239	break;
148	✗✓	1239	if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) {
149			const AVCodecDescriptor *desc = avcodec_descriptor_get(ctx->par_in->codec_id);
150			av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the "
151			"bitstream filter '%s'. Supported codecs are: ",
152			desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name);
153			for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) {
154			desc = avcodec_descriptor_get(ctx->filter->codec_ids[i]);
155			av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
156			desc ? desc->name : "unknown", ctx->filter->codec_ids[i]);
157			}
158			av_log(ctx, AV_LOG_ERROR, "\n");
159			return AVERROR(EINVAL);
160			}
161			}
162
163			/* initialize output parameters to be the same as input
164			* init below might overwrite that */
165		13185	ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in);
166	✗✓	13185	if (ret < 0)
167			return ret;
168
169		13185	ctx->time_base_out = ctx->time_base_in;
170
171	✓✓	13185	if (ctx->filter->init) {
172		1234	ret = ctx->filter->init(ctx);
173	✗✓	1234	if (ret < 0)
174			return ret;
175			}
176
177		13185	return 0;
178			}
179
180		28	void av_bsf_flush(AVBSFContext *ctx)
181			{
182		28	AVBSFInternal *bsfi = ctx->internal;
183
184		28	bsfi->eof = 0;
185
186		28	av_packet_unref(bsfi->buffer_pkt);
187
188	✗✓	28	if (ctx->filter->flush)
189			ctx->filter->flush(ctx);
190		28	}
191
192		422147	int av_bsf_send_packet(AVBSFContext ctx, AVPacket pkt)
193			{
194		422147	AVBSFInternal *bsfi = ctx->internal;
195			int ret;
196
197	✓✓✓✓ ✓✗	422147	if (!pkt \|\| (!pkt->data && !pkt->side_data_elems)) {
198		5752	bsfi->eof = 1;
199		5752	return 0;
200			}
201
202	✗✓	416395	if (bsfi->eof) {
203			av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
204			return AVERROR(EINVAL);
205			}
206
207	✓✗	416395	if (bsfi->buffer_pkt->data \|\|
208	✗✓	416395	bsfi->buffer_pkt->side_data_elems)
209			return AVERROR(EAGAIN);
210
211		416395	ret = av_packet_make_refcounted(pkt);
212	✗✓	416395	if (ret < 0)
213			return ret;
214		416395	av_packet_move_ref(bsfi->buffer_pkt, pkt);
215
216		416395	return 0;
217			}
218
219		837764	int av_bsf_receive_packet(AVBSFContext ctx, AVPacket pkt)
220			{
221		837764	return ctx->filter->filter(ctx, pkt);
222			}
223
224		578	int ff_bsf_get_packet(AVBSFContext ctx, AVPacket *pkt)
225			{
226		578	AVBSFInternal *bsfi = ctx->internal;
227			AVPacket *tmp_pkt;
228
229	✗✓	578	if (bsfi->eof)
230			return AVERROR_EOF;
231
232	✓✓	578	if (!bsfi->buffer_pkt->data &&
233	✓✗	132	!bsfi->buffer_pkt->side_data_elems)
234		132	return AVERROR(EAGAIN);
235
236		446	tmp_pkt = av_packet_alloc();
237	✗✓	446	if (!tmp_pkt)
238			return AVERROR(ENOMEM);
239
240		446	*pkt = bsfi->buffer_pkt;
241		446	bsfi->buffer_pkt = tmp_pkt;
242
243		446	return 0;
244			}
245
246		837124	int ff_bsf_get_packet_ref(AVBSFContext ctx, AVPacket pkt)
247			{
248		837124	AVBSFInternal *bsfi = ctx->internal;
249
250	✓✓	837124	if (bsfi->eof)
251		5752	return AVERROR_EOF;
252
253	✓✓	831372	if (!bsfi->buffer_pkt->data &&
254	✓✗	415423	!bsfi->buffer_pkt->side_data_elems)
255		415423	return AVERROR(EAGAIN);
256
257		415949	av_packet_move_ref(pkt, bsfi->buffer_pkt);
258
259		415949	return 0;
260			}
261
262			typedef struct BSFListContext {
263			const AVClass *class;
264
265			AVBSFContext **bsfs;
266			int nb_bsfs;
267
268			unsigned idx; // index of currently processed BSF
269			unsigned flushed_idx; // index of BSF being flushed
270
271			char * item_name;
272			} BSFListContext;
273
274
275			static int bsf_list_init(AVBSFContext *bsf)
276			{
277			BSFListContext *lst = bsf->priv_data;
278			int ret, i;
279			const AVCodecParameters *cod_par = bsf->par_in;
280			AVRational tb = bsf->time_base_in;
281
282			for (i = 0; i < lst->nb_bsfs; ++i) {
283			ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par);
284			if (ret < 0)
285			goto fail;
286
287			lst->bsfs[i]->time_base_in = tb;
288
289			ret = av_bsf_init(lst->bsfs[i]);
290			if (ret < 0)
291			goto fail;
292
293			cod_par = lst->bsfs[i]->par_out;
294			tb = lst->bsfs[i]->time_base_out;
295			}
296
297			bsf->time_base_out = tb;
298			ret = avcodec_parameters_copy(bsf->par_out, cod_par);
299
300			fail:
301			return ret;
302			}
303
304			static int bsf_list_filter(AVBSFContext bsf, AVPacket out)
305			{
306			BSFListContext *lst = bsf->priv_data;
307			int ret;
308
309			if (!lst->nb_bsfs)
310			return ff_bsf_get_packet_ref(bsf, out);
311
312			while (1) {
313			if (lst->idx > lst->flushed_idx) {
314			ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
315			if (ret == AVERROR(EAGAIN)) {
316			/* no more packets from idx-1, try with previous */
317			lst->idx--;
318			continue;
319			} else if (ret == AVERROR_EOF) {
320			/* filter idx-1 is done, continue with idx...nb_bsfs */
321			lst->flushed_idx = lst->idx;
322			continue;
323			}else if (ret < 0) {
324			/* filtering error */
325			break;
326			}
327			} else {
328			ret = ff_bsf_get_packet_ref(bsf, out);
329			if (ret == AVERROR_EOF) {
330			lst->idx = lst->flushed_idx;
331			} else if (ret < 0)
332			break;
333			}
334
335			if (lst->idx < lst->nb_bsfs) {
336			AVPacket *pkt;
337			if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
338			/* ff_bsf_get_packet_ref returned EOF and idx is first
339			* filter of yet not flushed filter chain */
340			pkt = NULL;
341			} else {
342			pkt = out;
343			}
344			ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
345			if (ret < 0)
346			break;
347			lst->idx++;
348			} else {
349			/* The end of filter chain, break to return result */
350			break;
351			}
352			}
353
354			if (ret < 0)
355			av_packet_unref(out);
356
357			return ret;
358			}
359
360			static void bsf_list_flush(AVBSFContext *bsf)
361			{
362			BSFListContext *lst = bsf->priv_data;
363
364			for (int i = 0; i < lst->nb_bsfs; i++)
365			av_bsf_flush(lst->bsfs[i]);
366			lst->idx = lst->flushed_idx = 0;
367			}
368
369			static void bsf_list_close(AVBSFContext *bsf)
370			{
371			BSFListContext *lst = bsf->priv_data;
372			int i;
373
374			for (i = 0; i < lst->nb_bsfs; ++i)
375			av_bsf_free(&lst->bsfs[i]);
376			av_freep(&lst->bsfs);
377			av_freep(&lst->item_name);
378			}
379
380			static const char bsf_list_item_name(void ctx)
381			{
382			static const char *null_filter_name = "null";
383			AVBSFContext *bsf_ctx = ctx;
384			BSFListContext *lst = bsf_ctx->priv_data;
385
386			if (!lst->nb_bsfs)
387			return null_filter_name;
388
389			if (!lst->item_name) {
390			int i;
391			AVBPrint bp;
392			av_bprint_init(&bp, 16, 128);
393
394			av_bprintf(&bp, "bsf_list(");
395			for (i = 0; i < lst->nb_bsfs; i++)
396			av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name);
397			av_bprintf(&bp, ")");
398
399			av_bprint_finalize(&bp, &lst->item_name);
400			}
401
402			return lst->item_name;
403			}
404
405			static const AVClass bsf_list_class = {
406			.class_name = "bsf_list",
407			.item_name = bsf_list_item_name,
408			.version = LIBAVUTIL_VERSION_INT,
409			};
410
411			const AVBitStreamFilter ff_list_bsf = {
412			.name = "bsf_list",
413			.priv_data_size = sizeof(BSFListContext),
414			.priv_class = &bsf_list_class,
415			.init = bsf_list_init,
416			.filter = bsf_list_filter,
417			.flush = bsf_list_flush,
418			.close = bsf_list_close,
419			};
420
421			struct AVBSFList {
422			AVBSFContext **bsfs;
423			int nb_bsfs;
424			};
425
426			AVBSFList *av_bsf_list_alloc(void)
427			{
428			return av_mallocz(sizeof(AVBSFList));
429			}
430
431			void av_bsf_list_free(AVBSFList **lst)
432			{
433			int i;
434
435			if (!*lst)
436			return;
437
438			for (i = 0; i < (*lst)->nb_bsfs; ++i)
439			av_bsf_free(&(*lst)->bsfs[i]);
440			av_free((*lst)->bsfs);
441			av_freep(lst);
442			}
443
444			int av_bsf_list_append(AVBSFList lst, AVBSFContext bsf)
445			{
446			return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf);
447			}
448
449			int av_bsf_list_append2(AVBSFList lst, const char bsf_name, AVDictionary ** options)
450			{
451			int ret;
452			const AVBitStreamFilter *filter;
453			AVBSFContext *bsf;
454
455			filter = av_bsf_get_by_name(bsf_name);
456			if (!filter)
457			return AVERROR_BSF_NOT_FOUND;
458
459			ret = av_bsf_alloc(filter, &bsf);
460			if (ret < 0)
461			return ret;
462
463			if (options) {
464			ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN);
465			if (ret < 0)
466			goto end;
467			}
468
469			ret = av_bsf_list_append(lst, bsf);
470
471			end:
472			if (ret < 0)
473			av_bsf_free(&bsf);
474
475			return ret;
476			}
477
478			int av_bsf_list_finalize(AVBSFList lst, AVBSFContext bsf)
479			{
480			int ret = 0;
481			BSFListContext *ctx;
482
483			if ((*lst)->nb_bsfs == 1) {
484			bsf = (lst)->bsfs[0];
485			av_freep(&(*lst)->bsfs);
486			(*lst)->nb_bsfs = 0;
487			goto end;
488			}
489
490			ret = av_bsf_alloc(&ff_list_bsf, bsf);
491			if (ret < 0)
492			return ret;
493
494			ctx = (*bsf)->priv_data;
495
496			ctx->bsfs = (*lst)->bsfs;
497			ctx->nb_bsfs = (*lst)->nb_bsfs;
498
499			end:
500			av_freep(lst);
501			return ret;
502			}
503
504			static int bsf_parse_single(const char str, AVBSFList bsf_lst)
505			{
506			char bsf_name, bsf_options_str, *buf;
507			AVDictionary *bsf_options = NULL;
508			int ret = 0;
509
510			if (!(buf = av_strdup(str)))
511			return AVERROR(ENOMEM);
512
513			bsf_name = av_strtok(buf, "=", &bsf_options_str);
514			if (!bsf_name) {
515			ret = AVERROR(EINVAL);
516			goto end;
517			}
518
519			if (bsf_options_str) {
520			ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
521			if (ret < 0)
522			goto end;
523			}
524
525			ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options);
526
527			end:
528			av_dict_free(&bsf_options);
529			av_free(buf);
530			return ret;
531			}
532
533			int av_bsf_list_parse_str(const char str, AVBSFContext *bsf_lst)
534			{
535			AVBSFList *lst;
536			char bsf_str, buf, dup, saveptr;
537			int ret;
538
539			if (!str)
540			return av_bsf_get_null_filter(bsf_lst);
541
542			lst = av_bsf_list_alloc();
543			if (!lst)
544			return AVERROR(ENOMEM);
545
546			if (!(dup = buf = av_strdup(str))) {
547			ret = AVERROR(ENOMEM);
548			goto end;
549			}
550
551			while (1) {
552			bsf_str = av_strtok(buf, ",", &saveptr);
553			if (!bsf_str)
554			break;
555
556			ret = bsf_parse_single(bsf_str, lst);
557			if (ret < 0)
558			goto end;
559
560			buf = NULL;
561			}
562
563			ret = av_bsf_list_finalize(&lst, bsf_lst);
564			end:
565			if (ret < 0)
566			av_bsf_list_free(&lst);
567			av_free(dup);
568			return ret;
569			}
570
571			int av_bsf_get_null_filter(AVBSFContext **bsf)
572			{
573			return av_bsf_alloc(&ff_list_bsf, bsf);
574			}