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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/avrndec.c	Lines:	0	76	0.0 %
Date:	2019-11-18 18:00:01	Branches:	0	44	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) {
        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);

        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_close(a->mjpeg_avctx);
    av_freep(&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,
};


Generated by: GCOVR (Version 4.1)

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			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
58			av_dict_set(&thread_opt, "threads", "1", 0); // Is this needed ?
59			a->mjpeg_avctx->refcounted_frames = 1;
60			a->mjpeg_avctx->flags = avctx->flags;
61			a->mjpeg_avctx->idct_algo = avctx->idct_algo;
62			a->mjpeg_avctx->lowres = avctx->lowres;
63			a->mjpeg_avctx->width = avctx->width;
64			a->mjpeg_avctx->height = avctx->height;
65
66			if ((ret = ff_codec_open2_recursive(a->mjpeg_avctx, codec, &thread_opt)) < 0) {
67			av_log(avctx, AV_LOG_ERROR, "MJPEG codec failed to open\n");
68			}
69			av_dict_free(&thread_opt);
70
71			return ret;
72			}
73
74			if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
75			return ret;
76
77			avctx->pix_fmt = AV_PIX_FMT_UYVY422;
78
79			if(avctx->extradata_size >= 9 && avctx->extradata[4]+28 < avctx->extradata_size) {
80			int ndx = avctx->extradata[4] + 4;
81			a->interlace = !memcmp(avctx->extradata + ndx, "1:1(", 4);
82			if(a->interlace) {
83			a->tff = avctx->extradata[ndx + 24] == 1;
84			}
85			}
86
87			return 0;
88			}
89
90			static av_cold int end(AVCodecContext *avctx)
91			{
92			AVRnContext *a = avctx->priv_data;
93
94			avcodec_close(a->mjpeg_avctx);
95			av_freep(&a->mjpeg_avctx);
96
97			return 0;
98			}
99
100			static int decode_frame(AVCodecContext avctx, void data,
101			int got_frame, AVPacket avpkt)
102			{
103			AVRnContext *a = avctx->priv_data;
104			AVFrame *p = data;
105			const uint8_t *buf = avpkt->data;
106			int buf_size = avpkt->size;
107			int y, ret, true_height;
108
109			if(a->is_mjpeg) {
110			ret = avcodec_decode_video2(a->mjpeg_avctx, data, got_frame, avpkt);
111
112			if (ret >= 0 && *got_frame && avctx->width <= p->width && avctx->height <= p->height) {
113			int shift = p->height - avctx->height;
114			int subsample_h, subsample_v;
115
116			av_pix_fmt_get_chroma_sub_sample(p->format, &subsample_h, &subsample_v);
117
118			p->data[0] += p->linesize[0] * shift;
119			if (p->data[2]) {
120			p->data[1] += p->linesize[1] * (shift>>subsample_v);
121			p->data[2] += p->linesize[2] * (shift>>subsample_v);
122			}
123
124			p->width = avctx->width;
125			p->height = avctx->height;
126			}
127			avctx->pix_fmt = a->mjpeg_avctx->pix_fmt;
128			return ret;
129			}
130
131			true_height = buf_size / (2*avctx->width);
132
133			if(buf_size < 2avctx->width avctx->height) {
134			av_log(avctx, AV_LOG_ERROR, "packet too small\n");
135			return AVERROR_INVALIDDATA;
136			}
137
138			if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
139			return ret;
140			p->pict_type= AV_PICTURE_TYPE_I;
141			p->key_frame= 1;
142
143			if(a->interlace) {
144			buf += (true_height - avctx->height)*avctx->width;
145			for(y = 0; y < avctx->height-1; y+=2) {
146			memcpy(p->data[0] + (y+ a->tff)p->linesize[0], buf , 2avctx->width);
147			memcpy(p->data[0] + (y+!a->tff)p->linesize[0], buf + avctx->widthtrue_height+4, 2*avctx->width);
148			buf += 2*avctx->width;
149			}
150			} else {
151			buf += (true_height - avctx->height)avctx->width2;
152			for(y = 0; y < avctx->height; y++) {
153			memcpy(p->data[0] + yp->linesize[0], buf, 2avctx->width);
154			buf += 2*avctx->width;
155			}
156			}
157
158			*got_frame = 1;
159			return buf_size;
160			}
161
162			AVCodec ff_avrn_decoder = {
163			.name = "avrn",
164			.long_name = NULL_IF_CONFIG_SMALL("Avid AVI Codec"),
165			.type = AVMEDIA_TYPE_VIDEO,
166			.id = AV_CODEC_ID_AVRN,
167			.priv_data_size = sizeof(AVRnContext),
168			.init = init,
169			.close = end,
170			.decode = decode_frame,
171			.max_lowres = 3,
172			.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
173			};