FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/avrndec.c	Lines:	0	77	0.0 %
Date:	2020-11-28 20:53:16	Branches:	0	46	0.0 %


/*
 * AVRn decoder
 * Copyright (c) 2012 Michael Niedermayer
 *
 * 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 "avcodec.h"
#include "internal.h"
#include "mjpeg.h"
#include "mjpegdec.h"
#include "libavutil/imgutils.h"

typedef struct {
    AVCodecContext *mjpeg_avctx;
    int is_mjpeg;
    int interlace;
    int tff;
} AVRnContext;

static av_cold int init(AVCodecContext *avctx)
{
    AVRnContext *a = avctx->priv_data;
    int ret;

    // Support "Resolution 1:1" for Avid AVI Codec
    a->is_mjpeg = avctx->extradata_size < 31 || memcmp(&avctx->extradata[28], "1:1", 3);

    if(!a->is_mjpeg && avctx->lowres) {
        av_log(avctx, AV_LOG_ERROR, "lowres is not possible with rawvideo\n");
        return AVERROR(EINVAL);
    }

    if(a->is_mjpeg) {
        const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
        AVDictionary *thread_opt = NULL;
        if (!codec) {
            av_log(avctx, AV_LOG_ERROR, "MJPEG codec not found\n");
            return AVERROR_DECODER_NOT_FOUND;
        }

        a->mjpeg_avctx = avcodec_alloc_context3(codec);
        if (!a->mjpeg_avctx)
            return AVERROR(ENOMEM);

        av_dict_set(&thread_opt, "threads", "1", 0); // Is this needed ?
        a->mjpeg_avctx->refcounted_frames = 1;
        a->mjpeg_avctx->flags = avctx->flags;
        a->mjpeg_avctx->idct_algo = avctx->idct_algo;
        a->mjpeg_avctx->lowres = avctx->lowres;
        a->mjpeg_avctx->width = avctx->width;
        a->mjpeg_avctx->height = avctx->height;

        if ((ret = ff_codec_open2_recursive(a->mjpeg_avctx, codec, &thread_opt)) < 0) {
            av_log(avctx, AV_LOG_ERROR, "MJPEG codec failed to open\n");
        }
        av_dict_free(&thread_opt);

        return ret;
    }

    if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
        return ret;

    avctx->pix_fmt = AV_PIX_FMT_UYVY422;

    if(avctx->extradata_size >= 9 && avctx->extradata[4]+28 < avctx->extradata_size) {
        int ndx = avctx->extradata[4] + 4;
        a->interlace = !memcmp(avctx->extradata + ndx, "1:1(", 4);
        if(a->interlace) {
            a->tff = avctx->extradata[ndx + 24] == 1;
        }
    }

    return 0;
}

static av_cold int end(AVCodecContext *avctx)
{
    AVRnContext *a = avctx->priv_data;

    avcodec_free_context(&a->mjpeg_avctx);

    return 0;
}

static int decode_frame(AVCodecContext *avctx, void *data,
                        int *got_frame, AVPacket *avpkt)
{
    AVRnContext *a = avctx->priv_data;
    AVFrame *p = data;
    const uint8_t *buf = avpkt->data;
    int buf_size       = avpkt->size;
    int y, ret, true_height;

    if(a->is_mjpeg) {
        ret = avcodec_decode_video2(a->mjpeg_avctx, data, got_frame, avpkt);

        if (ret >= 0 && *got_frame && avctx->width <= p->width && avctx->height <= p->height) {
            int shift = p->height - avctx->height;
            int subsample_h, subsample_v;

            av_pix_fmt_get_chroma_sub_sample(p->format, &subsample_h, &subsample_v);

            p->data[0] += p->linesize[0] * shift;
            if (p->data[2]) {
                p->data[1] += p->linesize[1] * (shift>>subsample_v);
                p->data[2] += p->linesize[2] * (shift>>subsample_v);
            }

            p->width  = avctx->width;
            p->height = avctx->height;
        }
        avctx->pix_fmt = a->mjpeg_avctx->pix_fmt;
        return ret;
    }

    true_height    = buf_size / (2*avctx->width);

    if(buf_size < 2*avctx->width * avctx->height) {
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
        return AVERROR_INVALIDDATA;
    }

    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
        return ret;
    p->pict_type= AV_PICTURE_TYPE_I;
    p->key_frame= 1;

    if(a->interlace) {
        buf += (true_height - avctx->height)*avctx->width;
        for(y = 0; y < avctx->height-1; y+=2) {
            memcpy(p->data[0] + (y+ a->tff)*p->linesize[0], buf                             , 2*avctx->width);
            memcpy(p->data[0] + (y+!a->tff)*p->linesize[0], buf + avctx->width*true_height+4, 2*avctx->width);
            buf += 2*avctx->width;
        }
    } else {
        buf += (true_height - avctx->height)*avctx->width*2;
        for(y = 0; y < avctx->height; y++) {
            memcpy(p->data[0] + y*p->linesize[0], buf, 2*avctx->width);
            buf += 2*avctx->width;
        }
    }

    *got_frame      = 1;
    return buf_size;
}

AVCodec ff_avrn_decoder = {
    .name           = "avrn",
    .long_name      = NULL_IF_CONFIG_SMALL("Avid AVI Codec"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_AVRN,
    .priv_data_size = sizeof(AVRnContext),
    .init           = init,
    .close          = end,
    .decode         = decode_frame,
    .max_lowres     = 3,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* AVRn decoder
3			* Copyright (c) 2012 Michael Niedermayer
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include "avcodec.h"
23			#include "internal.h"
24			#include "mjpeg.h"
25			#include "mjpegdec.h"
26			#include "libavutil/imgutils.h"
27
28			typedef struct {
29			AVCodecContext *mjpeg_avctx;
30			int is_mjpeg;
31			int interlace;
32			int tff;
33			} AVRnContext;
34
35			static av_cold int init(AVCodecContext *avctx)
36			{
37			AVRnContext *a = avctx->priv_data;
38			int ret;
39
40			// Support "Resolution 1:1" for Avid AVI Codec
41			a->is_mjpeg = avctx->extradata_size < 31 \|\| memcmp(&avctx->extradata[28], "1:1", 3);
42
43			if(!a->is_mjpeg && avctx->lowres) {
44			av_log(avctx, AV_LOG_ERROR, "lowres is not possible with rawvideo\n");
45			return AVERROR(EINVAL);
46			}
47
48			if(a->is_mjpeg) {
49			const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
50			AVDictionary *thread_opt = NULL;
51			if (!codec) {
52			av_log(avctx, AV_LOG_ERROR, "MJPEG codec not found\n");
53			return AVERROR_DECODER_NOT_FOUND;
54			}
55
56			a->mjpeg_avctx = avcodec_alloc_context3(codec);
57			if (!a->mjpeg_avctx)
58			return AVERROR(ENOMEM);
59
60			av_dict_set(&thread_opt, "threads", "1", 0); // Is this needed ?
61			a->mjpeg_avctx->refcounted_frames = 1;
62			a->mjpeg_avctx->flags = avctx->flags;
63			a->mjpeg_avctx->idct_algo = avctx->idct_algo;
64			a->mjpeg_avctx->lowres = avctx->lowres;
65			a->mjpeg_avctx->width = avctx->width;
66			a->mjpeg_avctx->height = avctx->height;
67
68			if ((ret = ff_codec_open2_recursive(a->mjpeg_avctx, codec, &thread_opt)) < 0) {
69			av_log(avctx, AV_LOG_ERROR, "MJPEG codec failed to open\n");
70			}
71			av_dict_free(&thread_opt);
72
73			return ret;
74			}
75
76			if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
77			return ret;
78
79			avctx->pix_fmt = AV_PIX_FMT_UYVY422;
80
81			if(avctx->extradata_size >= 9 && avctx->extradata[4]+28 < avctx->extradata_size) {
82			int ndx = avctx->extradata[4] + 4;
83			a->interlace = !memcmp(avctx->extradata + ndx, "1:1(", 4);
84			if(a->interlace) {
85			a->tff = avctx->extradata[ndx + 24] == 1;
86			}
87			}
88
89			return 0;
90			}
91
92			static av_cold int end(AVCodecContext *avctx)
93			{
94			AVRnContext *a = avctx->priv_data;
95
96			avcodec_free_context(&a->mjpeg_avctx);
97
98			return 0;
99			}
100
101			static int decode_frame(AVCodecContext avctx, void data,
102			int got_frame, AVPacket avpkt)
103			{
104			AVRnContext *a = avctx->priv_data;
105			AVFrame *p = data;
106			const uint8_t *buf = avpkt->data;
107			int buf_size = avpkt->size;
108			int y, ret, true_height;
109
110			if(a->is_mjpeg) {
111			ret = avcodec_decode_video2(a->mjpeg_avctx, data, got_frame, avpkt);
112
113			if (ret >= 0 && *got_frame && avctx->width <= p->width && avctx->height <= p->height) {
114			int shift = p->height - avctx->height;
115			int subsample_h, subsample_v;
116
117			av_pix_fmt_get_chroma_sub_sample(p->format, &subsample_h, &subsample_v);
118
119			p->data[0] += p->linesize[0] * shift;
120			if (p->data[2]) {
121			p->data[1] += p->linesize[1] * (shift>>subsample_v);
122			p->data[2] += p->linesize[2] * (shift>>subsample_v);
123			}
124
125			p->width = avctx->width;
126			p->height = avctx->height;
127			}
128			avctx->pix_fmt = a->mjpeg_avctx->pix_fmt;
129			return ret;
130			}
131
132			true_height = buf_size / (2*avctx->width);
133
134			if(buf_size < 2avctx->width avctx->height) {
135			av_log(avctx, AV_LOG_ERROR, "packet too small\n");
136			return AVERROR_INVALIDDATA;
137			}
138
139			if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
140			return ret;
141			p->pict_type= AV_PICTURE_TYPE_I;
142			p->key_frame= 1;
143
144			if(a->interlace) {
145			buf += (true_height - avctx->height)*avctx->width;
146			for(y = 0; y < avctx->height-1; y+=2) {
147			memcpy(p->data[0] + (y+ a->tff)p->linesize[0], buf , 2avctx->width);
148			memcpy(p->data[0] + (y+!a->tff)p->linesize[0], buf + avctx->widthtrue_height+4, 2*avctx->width);
149			buf += 2*avctx->width;
150			}
151			} else {
152			buf += (true_height - avctx->height)avctx->width2;
153			for(y = 0; y < avctx->height; y++) {
154			memcpy(p->data[0] + yp->linesize[0], buf, 2avctx->width);
155			buf += 2*avctx->width;
156			}
157			}
158
159			*got_frame = 1;
160			return buf_size;
161			}
162
163			AVCodec ff_avrn_decoder = {
164			.name = "avrn",
165			.long_name = NULL_IF_CONFIG_SMALL("Avid AVI Codec"),
166			.type = AVMEDIA_TYPE_VIDEO,
167			.id = AV_CODEC_ID_AVRN,
168			.priv_data_size = sizeof(AVRnContext),
169			.init = init,
170			.close = end,
171			.decode = decode_frame,
172			.max_lowres = 3,
173			.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE \| FF_CODEC_CAP_INIT_CLEANUP,
174			};