Head

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/bsf.c	Lines:	91	286	31.8 %
Date:	2020-01-29 01:05:39	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);

    av_opt_free(ctx);

    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 AVClass bsf_class = {
    .class_name       = "AVBSFContext",
    .item_name        = av_default_item_name,
    .version          = LIBAVUTIL_VERSION_INT,
    .child_next       = bsf_child_next,
    .child_class_next = ff_bsf_child_class_next,
};

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;
    }

    av_opt_set_defaults(ctx);

    /* 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 4.1)

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		31830	void av_bsf_free(AVBSFContext **pctx)
36			{
37			AVBSFContext *ctx;
38
39	✓✗✓✓	31830	if (!pctx \|\| !*pctx)
40		18666	return;
41		13164	ctx = *pctx;
42
43	✓✓	13164	if (ctx->filter->close)
44		1225	ctx->filter->close(ctx);
45	✓✓✓✗	13164	if (ctx->filter->priv_class && ctx->priv_data)
46		748	av_opt_free(ctx->priv_data);
47
48		13164	av_opt_free(ctx);
49
50	✓✗	13164	if (ctx->internal)
51		13164	av_packet_free(&ctx->internal->buffer_pkt);
52		13164	av_freep(&ctx->internal);
53		13164	av_freep(&ctx->priv_data);
54
55		13164	avcodec_parameters_free(&ctx->par_in);
56		13164	avcodec_parameters_free(&ctx->par_out);
57
58		13164	av_freep(pctx);
59			}
60
61			static void bsf_child_next(void obj, void *prev)
62			{
63			AVBSFContext *ctx = obj;
64			if (!prev && ctx->filter->priv_class)
65			return ctx->priv_data;
66			return NULL;
67			}
68
69			static const AVClass bsf_class = {
70			.class_name = "AVBSFContext",
71			.item_name = av_default_item_name,
72			.version = LIBAVUTIL_VERSION_INT,
73			.child_next = bsf_child_next,
74			.child_class_next = ff_bsf_child_class_next,
75			};
76
77			const AVClass *av_bsf_get_class(void)
78			{
79			return &bsf_class;
80			}
81
82		13164	int av_bsf_alloc(const AVBitStreamFilter filter, AVBSFContext *pctx)
83			{
84			AVBSFContext *ctx;
85			AVBSFInternal *bsfi;
86			int ret;
87
88		13164	ctx = av_mallocz(sizeof(*ctx));
89	✗✓	13164	if (!ctx)
90			return AVERROR(ENOMEM);
91
92		13164	ctx->av_class = &bsf_class;
93		13164	ctx->filter = filter;
94
95		13164	ctx->par_in = avcodec_parameters_alloc();
96		13164	ctx->par_out = avcodec_parameters_alloc();
97	✓✗✗✓	13164	if (!ctx->par_in \|\| !ctx->par_out) {
98			ret = AVERROR(ENOMEM);
99			goto fail;
100			}
101
102		13164	bsfi = av_mallocz(sizeof(*bsfi));
103	✗✓	13164	if (!bsfi) {
104			ret = AVERROR(ENOMEM);
105			goto fail;
106			}
107		13164	ctx->internal = bsfi;
108
109		13164	bsfi->buffer_pkt = av_packet_alloc();
110	✗✓	13164	if (!bsfi->buffer_pkt) {
111			ret = AVERROR(ENOMEM);
112			goto fail;
113			}
114
115		13164	av_opt_set_defaults(ctx);
116
117			/* allocate priv data and init private options */
118	✓✓	13164	if (filter->priv_data_size) {
119		1240	ctx->priv_data = av_mallocz(filter->priv_data_size);
120	✗✓	1240	if (!ctx->priv_data) {
121			ret = AVERROR(ENOMEM);
122			goto fail;
123			}
124	✓✓	1240	if (filter->priv_class) {
125		748	(const AVClass *)ctx->priv_data = filter->priv_class;
126		748	av_opt_set_defaults(ctx->priv_data);
127			}
128			}
129
130		13164	*pctx = ctx;
131		13164	return 0;
132			fail:
133			av_bsf_free(&ctx);
134			return ret;
135			}
136
137		13164	int av_bsf_init(AVBSFContext *ctx)
138			{
139			int ret, i;
140
141			/* check that the codec is supported */
142	✓✓	13164	if (ctx->filter->codec_ids) {
143	✓✗	4161	for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++)
144	✓✓	4161	if (ctx->par_in->codec_id == ctx->filter->codec_ids[i])
145		1239	break;
146	✗✓	1239	if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) {
147			const AVCodecDescriptor *desc = avcodec_descriptor_get(ctx->par_in->codec_id);
148			av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the "
149			"bitstream filter '%s'. Supported codecs are: ",
150			desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name);
151			for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) {
152			desc = avcodec_descriptor_get(ctx->filter->codec_ids[i]);
153			av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
154			desc ? desc->name : "unknown", ctx->filter->codec_ids[i]);
155			}
156			av_log(ctx, AV_LOG_ERROR, "\n");
157			return AVERROR(EINVAL);
158			}
159			}
160
161			/* initialize output parameters to be the same as input
162			* init below might overwrite that */
163		13164	ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in);
164	✗✓	13164	if (ret < 0)
165			return ret;
166
167		13164	ctx->time_base_out = ctx->time_base_in;
168
169	✓✓	13164	if (ctx->filter->init) {
170		1234	ret = ctx->filter->init(ctx);
171	✗✓	1234	if (ret < 0)
172			return ret;
173			}
174
175		13164	return 0;
176			}
177
178		28	void av_bsf_flush(AVBSFContext *ctx)
179			{
180		28	AVBSFInternal *bsfi = ctx->internal;
181
182		28	bsfi->eof = 0;
183
184		28	av_packet_unref(bsfi->buffer_pkt);
185
186	✗✓	28	if (ctx->filter->flush)
187			ctx->filter->flush(ctx);
188		28	}
189
190		399934	int av_bsf_send_packet(AVBSFContext ctx, AVPacket pkt)
191			{
192		399934	AVBSFInternal *bsfi = ctx->internal;
193			int ret;
194
195	✓✓✓✓ ✓✗	399934	if (!pkt \|\| (!pkt->data && !pkt->side_data_elems)) {
196		5743	bsfi->eof = 1;
197		5743	return 0;
198			}
199
200	✗✓	394191	if (bsfi->eof) {
201			av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
202			return AVERROR(EINVAL);
203			}
204
205	✓✗	394191	if (bsfi->buffer_pkt->data \|\|
206	✗✓	394191	bsfi->buffer_pkt->side_data_elems)
207			return AVERROR(EAGAIN);
208
209		394191	ret = av_packet_make_refcounted(pkt);
210	✗✓	394191	if (ret < 0)
211			return ret;
212		394191	av_packet_move_ref(bsfi->buffer_pkt, pkt);
213
214		394191	return 0;
215			}
216
217		793449	int av_bsf_receive_packet(AVBSFContext ctx, AVPacket pkt)
218			{
219		793449	return ctx->filter->filter(ctx, pkt);
220			}
221
222		578	int ff_bsf_get_packet(AVBSFContext ctx, AVPacket *pkt)
223			{
224		578	AVBSFInternal *bsfi = ctx->internal;
225			AVPacket *tmp_pkt;
226
227	✗✓	578	if (bsfi->eof)
228			return AVERROR_EOF;
229
230	✓✓	578	if (!bsfi->buffer_pkt->data &&
231	✓✗	132	!bsfi->buffer_pkt->side_data_elems)
232		132	return AVERROR(EAGAIN);
233
234		446	tmp_pkt = av_packet_alloc();
235	✗✓	446	if (!tmp_pkt)
236			return AVERROR(ENOMEM);
237
238		446	*pkt = bsfi->buffer_pkt;
239		446	bsfi->buffer_pkt = tmp_pkt;
240
241		446	return 0;
242			}
243
244		792809	int ff_bsf_get_packet_ref(AVBSFContext ctx, AVPacket pkt)
245			{
246		792809	AVBSFInternal *bsfi = ctx->internal;
247
248	✓✓	792809	if (bsfi->eof)
249		5743	return AVERROR_EOF;
250
251	✓✓	787066	if (!bsfi->buffer_pkt->data &&
252	✓✗	393321	!bsfi->buffer_pkt->side_data_elems)
253		393321	return AVERROR(EAGAIN);
254
255		393745	av_packet_move_ref(pkt, bsfi->buffer_pkt);
256
257		393745	return 0;
258			}
259
260			typedef struct BSFListContext {
261			const AVClass *class;
262
263			AVBSFContext **bsfs;
264			int nb_bsfs;
265
266			unsigned idx; // index of currently processed BSF
267			unsigned flushed_idx; // index of BSF being flushed
268
269			char * item_name;
270			} BSFListContext;
271
272
273			static int bsf_list_init(AVBSFContext *bsf)
274			{
275			BSFListContext *lst = bsf->priv_data;
276			int ret, i;
277			const AVCodecParameters *cod_par = bsf->par_in;
278			AVRational tb = bsf->time_base_in;
279
280			for (i = 0; i < lst->nb_bsfs; ++i) {
281			ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par);
282			if (ret < 0)
283			goto fail;
284
285			lst->bsfs[i]->time_base_in = tb;
286
287			ret = av_bsf_init(lst->bsfs[i]);
288			if (ret < 0)
289			goto fail;
290
291			cod_par = lst->bsfs[i]->par_out;
292			tb = lst->bsfs[i]->time_base_out;
293			}
294
295			bsf->time_base_out = tb;
296			ret = avcodec_parameters_copy(bsf->par_out, cod_par);
297
298			fail:
299			return ret;
300			}
301
302			static int bsf_list_filter(AVBSFContext bsf, AVPacket out)
303			{
304			BSFListContext *lst = bsf->priv_data;
305			int ret;
306
307			if (!lst->nb_bsfs)
308			return ff_bsf_get_packet_ref(bsf, out);
309
310			while (1) {
311			if (lst->idx > lst->flushed_idx) {
312			ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
313			if (ret == AVERROR(EAGAIN)) {
314			/* no more packets from idx-1, try with previous */
315			lst->idx--;
316			continue;
317			} else if (ret == AVERROR_EOF) {
318			/* filter idx-1 is done, continue with idx...nb_bsfs */
319			lst->flushed_idx = lst->idx;
320			continue;
321			}else if (ret < 0) {
322			/* filtering error */
323			break;
324			}
325			} else {
326			ret = ff_bsf_get_packet_ref(bsf, out);
327			if (ret == AVERROR_EOF) {
328			lst->idx = lst->flushed_idx;
329			} else if (ret < 0)
330			break;
331			}
332
333			if (lst->idx < lst->nb_bsfs) {
334			AVPacket *pkt;
335			if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
336			/* ff_bsf_get_packet_ref returned EOF and idx is first
337			* filter of yet not flushed filter chain */
338			pkt = NULL;
339			} else {
340			pkt = out;
341			}
342			ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
343			if (ret < 0)
344			break;
345			lst->idx++;
346			} else {
347			/* The end of filter chain, break to return result */
348			break;
349			}
350			}
351
352			if (ret < 0)
353			av_packet_unref(out);
354
355			return ret;
356			}
357
358			static void bsf_list_flush(AVBSFContext *bsf)
359			{
360			BSFListContext *lst = bsf->priv_data;
361
362			for (int i = 0; i < lst->nb_bsfs; i++)
363			av_bsf_flush(lst->bsfs[i]);
364			lst->idx = lst->flushed_idx = 0;
365			}
366
367			static void bsf_list_close(AVBSFContext *bsf)
368			{
369			BSFListContext *lst = bsf->priv_data;
370			int i;
371
372			for (i = 0; i < lst->nb_bsfs; ++i)
373			av_bsf_free(&lst->bsfs[i]);
374			av_freep(&lst->bsfs);
375			av_freep(&lst->item_name);
376			}
377
378			static const char bsf_list_item_name(void ctx)
379			{
380			static const char *null_filter_name = "null";
381			AVBSFContext *bsf_ctx = ctx;
382			BSFListContext *lst = bsf_ctx->priv_data;
383
384			if (!lst->nb_bsfs)
385			return null_filter_name;
386
387			if (!lst->item_name) {
388			int i;
389			AVBPrint bp;
390			av_bprint_init(&bp, 16, 128);
391
392			av_bprintf(&bp, "bsf_list(");
393			for (i = 0; i < lst->nb_bsfs; i++)
394			av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name);
395			av_bprintf(&bp, ")");
396
397			av_bprint_finalize(&bp, &lst->item_name);
398			}
399
400			return lst->item_name;
401			}
402
403			static const AVClass bsf_list_class = {
404			.class_name = "bsf_list",
405			.item_name = bsf_list_item_name,
406			.version = LIBAVUTIL_VERSION_INT,
407			};
408
409			const AVBitStreamFilter ff_list_bsf = {
410			.name = "bsf_list",
411			.priv_data_size = sizeof(BSFListContext),
412			.priv_class = &bsf_list_class,
413			.init = bsf_list_init,
414			.filter = bsf_list_filter,
415			.flush = bsf_list_flush,
416			.close = bsf_list_close,
417			};
418
419			struct AVBSFList {
420			AVBSFContext **bsfs;
421			int nb_bsfs;
422			};
423
424			AVBSFList *av_bsf_list_alloc(void)
425			{
426			return av_mallocz(sizeof(AVBSFList));
427			}
428
429			void av_bsf_list_free(AVBSFList **lst)
430			{
431			int i;
432
433			if (!*lst)
434			return;
435
436			for (i = 0; i < (*lst)->nb_bsfs; ++i)
437			av_bsf_free(&(*lst)->bsfs[i]);
438			av_free((*lst)->bsfs);
439			av_freep(lst);
440			}
441
442			int av_bsf_list_append(AVBSFList lst, AVBSFContext bsf)
443			{
444			return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf);
445			}
446
447			int av_bsf_list_append2(AVBSFList lst, const char bsf_name, AVDictionary ** options)
448			{
449			int ret;
450			const AVBitStreamFilter *filter;
451			AVBSFContext *bsf;
452
453			filter = av_bsf_get_by_name(bsf_name);
454			if (!filter)
455			return AVERROR_BSF_NOT_FOUND;
456
457			ret = av_bsf_alloc(filter, &bsf);
458			if (ret < 0)
459			return ret;
460
461			if (options) {
462			ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN);
463			if (ret < 0)
464			goto end;
465			}
466
467			ret = av_bsf_list_append(lst, bsf);
468
469			end:
470			if (ret < 0)
471			av_bsf_free(&bsf);
472
473			return ret;
474			}
475
476			int av_bsf_list_finalize(AVBSFList lst, AVBSFContext bsf)
477			{
478			int ret = 0;
479			BSFListContext *ctx;
480
481			if ((*lst)->nb_bsfs == 1) {
482			bsf = (lst)->bsfs[0];
483			av_freep(&(*lst)->bsfs);
484			(*lst)->nb_bsfs = 0;
485			goto end;
486			}
487
488			ret = av_bsf_alloc(&ff_list_bsf, bsf);
489			if (ret < 0)
490			return ret;
491
492			ctx = (*bsf)->priv_data;
493
494			ctx->bsfs = (*lst)->bsfs;
495			ctx->nb_bsfs = (*lst)->nb_bsfs;
496
497			end:
498			av_freep(lst);
499			return ret;
500			}
501
502			static int bsf_parse_single(const char str, AVBSFList bsf_lst)
503			{
504			char bsf_name, bsf_options_str, *buf;
505			AVDictionary *bsf_options = NULL;
506			int ret = 0;
507
508			if (!(buf = av_strdup(str)))
509			return AVERROR(ENOMEM);
510
511			bsf_name = av_strtok(buf, "=", &bsf_options_str);
512			if (!bsf_name) {
513			ret = AVERROR(EINVAL);
514			goto end;
515			}
516
517			if (bsf_options_str) {
518			ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
519			if (ret < 0)
520			goto end;
521			}
522
523			ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options);
524
525			end:
526			av_dict_free(&bsf_options);
527			av_free(buf);
528			return ret;
529			}
530
531			int av_bsf_list_parse_str(const char str, AVBSFContext *bsf_lst)
532			{
533			AVBSFList *lst;
534			char bsf_str, buf, dup, saveptr;
535			int ret;
536
537			if (!str)
538			return av_bsf_get_null_filter(bsf_lst);
539
540			lst = av_bsf_list_alloc();
541			if (!lst)
542			return AVERROR(ENOMEM);
543
544			if (!(dup = buf = av_strdup(str))) {
545			ret = AVERROR(ENOMEM);
546			goto end;
547			}
548
549			while (1) {
550			bsf_str = av_strtok(buf, ",", &saveptr);
551			if (!bsf_str)
552			break;
553
554			ret = bsf_parse_single(bsf_str, lst);
555			if (ret < 0)
556			goto end;
557
558			buf = NULL;
559			}
560
561			ret = av_bsf_list_finalize(&lst, bsf_lst);
562			end:
563			if (ret < 0)
564			av_bsf_list_free(&lst);
565			av_free(dup);
566			return ret;
567			}
568
569			int av_bsf_get_null_filter(AVBSFContext **bsf)
570			{
571			return av_bsf_alloc(&ff_list_bsf, bsf);
572			}