FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/mpeg2_metadata_bsf.c	Lines:	66	119	55.5 %
Date:	2021-01-21 13:05:02	Branches:	34	90	37.8 %


/*
 * 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 "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"

#include "bsf.h"
#include "bsf_internal.h"
#include "cbs.h"
#include "cbs_mpeg2.h"
#include "mpeg12.h"

typedef struct MPEG2MetadataContext {
    const AVClass *class;

    CodedBitstreamContext *cbc;
    CodedBitstreamFragment fragment;

    MPEG2RawExtensionData sequence_display_extension;

    AVRational display_aspect_ratio;

    AVRational frame_rate;

    int video_format;
    int colour_primaries;
    int transfer_characteristics;
    int matrix_coefficients;

    int mpeg1_warned;
} MPEG2MetadataContext;


static int mpeg2_metadata_update_fragment(AVBSFContext *bsf,
                                          CodedBitstreamFragment *frag)
{
    MPEG2MetadataContext             *ctx = bsf->priv_data;
    MPEG2RawSequenceHeader            *sh = NULL;
    MPEG2RawSequenceExtension         *se = NULL;
    MPEG2RawSequenceDisplayExtension *sde = NULL;
    int i, se_pos;

    for (i = 0; i < frag->nb_units; i++) {
        if (frag->units[i].type == MPEG2_START_SEQUENCE_HEADER) {
            sh = frag->units[i].content;
        } else if (frag->units[i].type == MPEG2_START_EXTENSION) {
            MPEG2RawExtensionData *ext = frag->units[i].content;
            if (ext->extension_start_code_identifier ==
                MPEG2_EXTENSION_SEQUENCE) {
                se = &ext->data.sequence;
                se_pos = i;
            } else if (ext->extension_start_code_identifier ==
                MPEG2_EXTENSION_SEQUENCE_DISPLAY) {
                sde = &ext->data.sequence_display;
            }
        }
    }

    if (!sh || !se) {
        // No sequence header and sequence extension: not an MPEG-2 video
        // sequence.
        if (sh && !ctx->mpeg1_warned) {
            av_log(bsf, AV_LOG_WARNING, "Stream contains a sequence "
                   "header but not a sequence extension: maybe it's "
                   "actually MPEG-1?\n");
            ctx->mpeg1_warned = 1;
        }
        return 0;
    }

    if (ctx->display_aspect_ratio.num && ctx->display_aspect_ratio.den) {
        int num, den;

        av_reduce(&num, &den, ctx->display_aspect_ratio.num,
                  ctx->display_aspect_ratio.den, 65535);

        if (num == 4 && den == 3)
            sh->aspect_ratio_information = 2;
        else if (num == 16 && den == 9)
            sh->aspect_ratio_information = 3;
        else if (num == 221 && den == 100)
            sh->aspect_ratio_information = 4;
        else
            sh->aspect_ratio_information = 1;
    }

    if (ctx->frame_rate.num && ctx->frame_rate.den) {
        int code, ext_n, ext_d;

        ff_mpeg12_find_best_frame_rate(ctx->frame_rate,
                                       &code, &ext_n, &ext_d, 0);

        sh->frame_rate_code        = code;
        se->frame_rate_extension_n = ext_n;
        se->frame_rate_extension_d = ext_d;
    }

    if (ctx->video_format             >= 0 ||
        ctx->colour_primaries         >= 0 ||
        ctx->transfer_characteristics >= 0 ||
        ctx->matrix_coefficients      >= 0) {
        if (!sde) {
            int err;
            ctx->sequence_display_extension.extension_start_code =
                MPEG2_START_EXTENSION;
            ctx->sequence_display_extension.extension_start_code_identifier =
                MPEG2_EXTENSION_SEQUENCE_DISPLAY;
            sde = &ctx->sequence_display_extension.data.sequence_display;

            *sde = (MPEG2RawSequenceDisplayExtension) {
                .video_format = 5,

                .colour_description       = 0,
                .colour_primaries         = 2,
                .transfer_characteristics = 2,
                .matrix_coefficients      = 2,

                .display_horizontal_size =
                    se->horizontal_size_extension << 12 | sh->horizontal_size_value,
                .display_vertical_size =
                    se->vertical_size_extension << 12 | sh->vertical_size_value,
            };

            err = ff_cbs_insert_unit_content(frag, se_pos + 1,
                                             MPEG2_START_EXTENSION,
                                             &ctx->sequence_display_extension,
                                             NULL);
            if (err < 0) {
                av_log(bsf, AV_LOG_ERROR, "Failed to insert new sequence "
                       "display extension.\n");
                return err;
            }
        }

        if (ctx->video_format >= 0)
            sde->video_format = ctx->video_format;

        if (ctx->colour_primaries         >= 0 ||
            ctx->transfer_characteristics >= 0 ||
            ctx->matrix_coefficients      >= 0) {
            sde->colour_description = 1;

            if (ctx->colour_primaries >= 0)
                sde->colour_primaries = ctx->colour_primaries;

            if (ctx->transfer_characteristics >= 0)
                sde->transfer_characteristics = ctx->transfer_characteristics;

            if (ctx->matrix_coefficients >= 0)
                sde->matrix_coefficients = ctx->matrix_coefficients;
        }
    }

    return 0;
}

static int mpeg2_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
{
    MPEG2MetadataContext *ctx = bsf->priv_data;
    CodedBitstreamFragment *frag = &ctx->fragment;
    int err;

    err = ff_bsf_get_packet_ref(bsf, pkt);
    if (err < 0)
        return err;

    err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
        goto fail;
    }

    err = mpeg2_metadata_update_fragment(bsf, frag);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR, "Failed to update frame fragment.\n");
        goto fail;
    }

    err = ff_cbs_write_packet(ctx->cbc, pkt, frag);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
        goto fail;
    }

    err = 0;
fail:
    ff_cbs_fragment_reset(frag);

    if (err < 0)
        av_packet_unref(pkt);

    return err;
}

static int mpeg2_metadata_init(AVBSFContext *bsf)
{
    MPEG2MetadataContext *ctx = bsf->priv_data;
    CodedBitstreamFragment *frag = &ctx->fragment;
    int err;

#define VALIDITY_CHECK(name) do { \
        if (!ctx->name) { \
            av_log(bsf, AV_LOG_ERROR, "The value 0 for %s is " \
                                      "forbidden.\n", #name); \
            return AVERROR(EINVAL); \
        } \
    } while (0)
    VALIDITY_CHECK(colour_primaries);
    VALIDITY_CHECK(transfer_characteristics);
    VALIDITY_CHECK(matrix_coefficients);
#undef VALIDITY_CHECK

    err = ff_cbs_init(&ctx->cbc, AV_CODEC_ID_MPEG2VIDEO, bsf);
    if (err < 0)
        return err;

    if (bsf->par_in->extradata) {
        err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
            goto fail;
        }

        err = mpeg2_metadata_update_fragment(bsf, frag);
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to update metadata fragment.\n");
            goto fail;
        }

        err = ff_cbs_write_extradata(ctx->cbc, bsf->par_out, frag);
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
            goto fail;
        }
    }

    err = 0;
fail:
    ff_cbs_fragment_reset(frag);
    return err;
}

static void mpeg2_metadata_close(AVBSFContext *bsf)
{
    MPEG2MetadataContext *ctx = bsf->priv_data;

    ff_cbs_fragment_free(&ctx->fragment);
    ff_cbs_close(&ctx->cbc);
}

#define OFFSET(x) offsetof(MPEG2MetadataContext, x)
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
static const AVOption mpeg2_metadata_options[] = {
    { "display_aspect_ratio", "Set display aspect ratio (table 6-3)",
        OFFSET(display_aspect_ratio), AV_OPT_TYPE_RATIONAL,
        { .dbl = 0.0 }, 0, 65535, FLAGS },

    { "frame_rate", "Set frame rate",
        OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL,
        { .dbl = 0.0 }, 0, UINT_MAX, FLAGS },

    { "video_format", "Set video format (table 6-6)",
        OFFSET(video_format), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 7, FLAGS },
    { "colour_primaries", "Set colour primaries (table 6-7)",
        OFFSET(colour_primaries), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 255, FLAGS },
    { "transfer_characteristics", "Set transfer characteristics (table 6-8)",
        OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 255, FLAGS },
    { "matrix_coefficients", "Set matrix coefficients (table 6-9)",
        OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
        { .i64 = -1 }, -1, 255, FLAGS },

    { NULL }
};

static const AVClass mpeg2_metadata_class = {
    .class_name = "mpeg2_metadata_bsf",
    .item_name  = av_default_item_name,
    .option     = mpeg2_metadata_options,
    .version    = LIBAVUTIL_VERSION_INT,
};

static const enum AVCodecID mpeg2_metadata_codec_ids[] = {
    AV_CODEC_ID_MPEG2VIDEO, AV_CODEC_ID_NONE,
};

const AVBitStreamFilter ff_mpeg2_metadata_bsf = {
    .name           = "mpeg2_metadata",
    .priv_data_size = sizeof(MPEG2MetadataContext),
    .priv_class     = &mpeg2_metadata_class,
    .init           = &mpeg2_metadata_init,
    .close          = &mpeg2_metadata_close,
    .filter         = &mpeg2_metadata_filter,
    .codec_ids      = mpeg2_metadata_codec_ids,
};


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 "libavutil/avstring.h"
20			#include "libavutil/common.h"
21			#include "libavutil/opt.h"
22
23			#include "bsf.h"
24			#include "bsf_internal.h"
25			#include "cbs.h"
26			#include "cbs_mpeg2.h"
27			#include "mpeg12.h"
28
29			typedef struct MPEG2MetadataContext {
30			const AVClass *class;
31
32			CodedBitstreamContext *cbc;
33			CodedBitstreamFragment fragment;
34
35			MPEG2RawExtensionData sequence_display_extension;
36
37			AVRational display_aspect_ratio;
38
39			AVRational frame_rate;
40
41			int video_format;
42			int colour_primaries;
43			int transfer_characteristics;
44			int matrix_coefficients;
45
46			int mpeg1_warned;
47			} MPEG2MetadataContext;
48
49
50		18	static int mpeg2_metadata_update_fragment(AVBSFContext *bsf,
51			CodedBitstreamFragment *frag)
52			{
53		18	MPEG2MetadataContext *ctx = bsf->priv_data;
54		18	MPEG2RawSequenceHeader *sh = NULL;
55		18	MPEG2RawSequenceExtension *se = NULL;
56		18	MPEG2RawSequenceDisplayExtension *sde = NULL;
57			int i, se_pos;
58
59	✓✓	8861	for (i = 0; i < frag->nb_units; i++) {
60	✓✓	8843	if (frag->units[i].type == MPEG2_START_SEQUENCE_HEADER) {
61		6	sh = frag->units[i].content;
62	✓✓	8837	} else if (frag->units[i].type == MPEG2_START_EXTENSION) {
63		53	MPEG2RawExtensionData *ext = frag->units[i].content;
64	✓✓	53	if (ext->extension_start_code_identifier ==
65			MPEG2_EXTENSION_SEQUENCE) {
66		6	se = &ext->data.sequence;
67		6	se_pos = i;
68	✓✓	47	} else if (ext->extension_start_code_identifier ==
69			MPEG2_EXTENSION_SEQUENCE_DISPLAY) {
70		3	sde = &ext->data.sequence_display;
71			}
72			}
73			}
74
75	✓✓✗✓	18	if (!sh \|\| !se) {
76			// No sequence header and sequence extension: not an MPEG-2 video
77			// sequence.
78	✗✓✗✗	12	if (sh && !ctx->mpeg1_warned) {
79			av_log(bsf, AV_LOG_WARNING, "Stream contains a sequence "
80			"header but not a sequence extension: maybe it's "
81			"actually MPEG-1?\n");
82			ctx->mpeg1_warned = 1;
83			}
84		12	return 0;
85			}
86
87	✗✓✗✗	6	if (ctx->display_aspect_ratio.num && ctx->display_aspect_ratio.den) {
88			int num, den;
89
90			av_reduce(&num, &den, ctx->display_aspect_ratio.num,
91			ctx->display_aspect_ratio.den, 65535);
92
93			if (num == 4 && den == 3)
94			sh->aspect_ratio_information = 2;
95			else if (num == 16 && den == 9)
96			sh->aspect_ratio_information = 3;
97			else if (num == 221 && den == 100)
98			sh->aspect_ratio_information = 4;
99			else
100			sh->aspect_ratio_information = 1;
101			}
102
103	✗✓✗✗	6	if (ctx->frame_rate.num && ctx->frame_rate.den) {
104			int code, ext_n, ext_d;
105
106			ff_mpeg12_find_best_frame_rate(ctx->frame_rate,
107			&code, &ext_n, &ext_d, 0);
108
109			sh->frame_rate_code = code;
110			se->frame_rate_extension_n = ext_n;
111			se->frame_rate_extension_d = ext_d;
112			}
113
114	✓✗	6	if (ctx->video_format >= 0 \|\|
115	✓✗	6	ctx->colour_primaries >= 0 \|\|
116	✓✗	6	ctx->transfer_characteristics >= 0 \|\|
117	✗✓	6	ctx->matrix_coefficients >= 0) {
118			if (!sde) {
119			int err;
120			ctx->sequence_display_extension.extension_start_code =
121			MPEG2_START_EXTENSION;
122			ctx->sequence_display_extension.extension_start_code_identifier =
123			MPEG2_EXTENSION_SEQUENCE_DISPLAY;
124			sde = &ctx->sequence_display_extension.data.sequence_display;
125
126			*sde = (MPEG2RawSequenceDisplayExtension) {
127			.video_format = 5,
128
129			.colour_description = 0,
130			.colour_primaries = 2,
131			.transfer_characteristics = 2,
132			.matrix_coefficients = 2,
133
134			.display_horizontal_size =
135			se->horizontal_size_extension << 12 \| sh->horizontal_size_value,
136			.display_vertical_size =
137			se->vertical_size_extension << 12 \| sh->vertical_size_value,
138			};
139
140			err = ff_cbs_insert_unit_content(frag, se_pos + 1,
141			MPEG2_START_EXTENSION,
142			&ctx->sequence_display_extension,
143			NULL);
144			if (err < 0) {
145			av_log(bsf, AV_LOG_ERROR, "Failed to insert new sequence "
146			"display extension.\n");
147			return err;
148			}
149			}
150
151			if (ctx->video_format >= 0)
152			sde->video_format = ctx->video_format;
153
154			if (ctx->colour_primaries >= 0 \|\|
155			ctx->transfer_characteristics >= 0 \|\|
156			ctx->matrix_coefficients >= 0) {
157			sde->colour_description = 1;
158
159			if (ctx->colour_primaries >= 0)
160			sde->colour_primaries = ctx->colour_primaries;
161
162			if (ctx->transfer_characteristics >= 0)
163			sde->transfer_characteristics = ctx->transfer_characteristics;
164
165			if (ctx->matrix_coefficients >= 0)
166			sde->matrix_coefficients = ctx->matrix_coefficients;
167			}
168			}
169
170		6	return 0;
171			}
172
173		30	static int mpeg2_metadata_filter(AVBSFContext bsf, AVPacket pkt)
174			{
175		30	MPEG2MetadataContext *ctx = bsf->priv_data;
176		30	CodedBitstreamFragment *frag = &ctx->fragment;
177			int err;
178
179		30	err = ff_bsf_get_packet_ref(bsf, pkt);
180	✓✓	30	if (err < 0)
181		15	return err;
182
183		15	err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
184	✗✓	15	if (err < 0) {
185			av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
186			goto fail;
187			}
188
189		15	err = mpeg2_metadata_update_fragment(bsf, frag);
190	✗✓	15	if (err < 0) {
191			av_log(bsf, AV_LOG_ERROR, "Failed to update frame fragment.\n");
192			goto fail;
193			}
194
195		15	err = ff_cbs_write_packet(ctx->cbc, pkt, frag);
196	✗✓	15	if (err < 0) {
197			av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
198			goto fail;
199			}
200
201		15	err = 0;
202		15	fail:
203		15	ff_cbs_fragment_reset(frag);
204
205	✗✓	15	if (err < 0)
206			av_packet_unref(pkt);
207
208		15	return err;
209			}
210
211		3	static int mpeg2_metadata_init(AVBSFContext *bsf)
212			{
213		3	MPEG2MetadataContext *ctx = bsf->priv_data;
214		3	CodedBitstreamFragment *frag = &ctx->fragment;
215			int err;
216
217			#define VALIDITY_CHECK(name) do { \
218			if (!ctx->name) { \
219			av_log(bsf, AV_LOG_ERROR, "The value 0 for %s is " \
220			"forbidden.\n", #name); \
221			return AVERROR(EINVAL); \
222			} \
223			} while (0)
224	✗✓	3	VALIDITY_CHECK(colour_primaries);
225	✗✓	3	VALIDITY_CHECK(transfer_characteristics);
226	✗✓	3	VALIDITY_CHECK(matrix_coefficients);
227			#undef VALIDITY_CHECK
228
229		3	err = ff_cbs_init(&ctx->cbc, AV_CODEC_ID_MPEG2VIDEO, bsf);
230	✗✓	3	if (err < 0)
231			return err;
232
233	✓✗	3	if (bsf->par_in->extradata) {
234		3	err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
235	✗✓	3	if (err < 0) {
236			av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
237			goto fail;
238			}
239
240		3	err = mpeg2_metadata_update_fragment(bsf, frag);
241	✗✓	3	if (err < 0) {
242			av_log(bsf, AV_LOG_ERROR, "Failed to update metadata fragment.\n");
243			goto fail;
244			}
245
246		3	err = ff_cbs_write_extradata(ctx->cbc, bsf->par_out, frag);
247	✗✓	3	if (err < 0) {
248			av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
249			goto fail;
250			}
251			}
252
253		3	err = 0;
254		3	fail:
255		3	ff_cbs_fragment_reset(frag);
256		3	return err;
257			}
258
259		3	static void mpeg2_metadata_close(AVBSFContext *bsf)
260			{
261		3	MPEG2MetadataContext *ctx = bsf->priv_data;
262
263		3	ff_cbs_fragment_free(&ctx->fragment);
264		3	ff_cbs_close(&ctx->cbc);
265		3	}
266
267			#define OFFSET(x) offsetof(MPEG2MetadataContext, x)
268			#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_BSF_PARAM)
269			static const AVOption mpeg2_metadata_options[] = {
270			{ "display_aspect_ratio", "Set display aspect ratio (table 6-3)",
271			OFFSET(display_aspect_ratio), AV_OPT_TYPE_RATIONAL,
272			{ .dbl = 0.0 }, 0, 65535, FLAGS },
273
274			{ "frame_rate", "Set frame rate",
275			OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL,
276			{ .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
277
278			{ "video_format", "Set video format (table 6-6)",
279			OFFSET(video_format), AV_OPT_TYPE_INT,
280			{ .i64 = -1 }, -1, 7, FLAGS },
281			{ "colour_primaries", "Set colour primaries (table 6-7)",
282			OFFSET(colour_primaries), AV_OPT_TYPE_INT,
283			{ .i64 = -1 }, -1, 255, FLAGS },
284			{ "transfer_characteristics", "Set transfer characteristics (table 6-8)",
285			OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
286			{ .i64 = -1 }, -1, 255, FLAGS },
287			{ "matrix_coefficients", "Set matrix coefficients (table 6-9)",
288			OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
289			{ .i64 = -1 }, -1, 255, FLAGS },
290
291			{ NULL }
292			};
293
294			static const AVClass mpeg2_metadata_class = {
295			.class_name = "mpeg2_metadata_bsf",
296			.item_name = av_default_item_name,
297			.option = mpeg2_metadata_options,
298			.version = LIBAVUTIL_VERSION_INT,
299			};
300
301			static const enum AVCodecID mpeg2_metadata_codec_ids[] = {
302			AV_CODEC_ID_MPEG2VIDEO, AV_CODEC_ID_NONE,
303			};
304
305			const AVBitStreamFilter ff_mpeg2_metadata_bsf = {
306			.name = "mpeg2_metadata",
307			.priv_data_size = sizeof(MPEG2MetadataContext),
308			.priv_class = &mpeg2_metadata_class,
309			.init = &mpeg2_metadata_init,
310			.close = &mpeg2_metadata_close,
311			.filter = &mpeg2_metadata_filter,
312			.codec_ids = mpeg2_metadata_codec_ids,
313			};