v210dec: check for coded_frame allocation failure
[libav.git] / libavcodec / v210dec.c
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1/*
2 * V210 decoder
3 *
4 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
5 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6 *
2912e87a 7 * This file is part of Libav.
ca0bb1c4 8 *
2912e87a 9 * Libav is free software; you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
2912e87a 14 * Libav is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
2912e87a 20 * License along with Libav; if not, write to the Free Software
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include "avcodec.h"
25#include "libavutil/bswap.h"
26
27static av_cold int decode_init(AVCodecContext *avctx)
28{
29 if (avctx->width & 1) {
30 av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
31 return -1;
32 }
08fa23d6 33 avctx->pix_fmt = PIX_FMT_YUV422P10;
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34 avctx->bits_per_raw_sample = 10;
35
d87d5025 36 avctx->coded_frame = avcodec_alloc_frame();
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37 if (!avctx->coded_frame)
38 return AVERROR(ENOMEM);
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39
40 return 0;
41}
42
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43static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
44 AVPacket *avpkt)
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45{
46 int h, w;
47 AVFrame *pic = avctx->coded_frame;
48 const uint8_t *psrc = avpkt->data;
49 uint16_t *y, *u, *v;
50 int aligned_width = ((avctx->width + 47) / 48) * 48;
51 int stride = aligned_width * 8 / 3;
52
53 if (pic->data[0])
54 avctx->release_buffer(avctx, pic);
55
56 if (avpkt->size < stride * avctx->height) {
57 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
58 return -1;
59 }
60
61 pic->reference = 0;
62 if (avctx->get_buffer(avctx, pic) < 0)
63 return -1;
64
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65 y = (uint16_t*)pic->data[0];
66 u = (uint16_t*)pic->data[1];
67 v = (uint16_t*)pic->data[2];
975a1447 68 pic->pict_type = AV_PICTURE_TYPE_I;
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69 pic->key_frame = 1;
70
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71#define READ_PIXELS(a, b, c) \
72 do { \
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73 val = av_le2ne32(*src++); \
74 *a++ = val & 0x3FF; \
75 *b++ = (val >> 10) & 0x3FF; \
76 *c++ = (val >> 20) & 0x3FF; \
e20b196d 77 } while (0)
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78
79 for (h = 0; h < avctx->height; h++) {
03e4f1ed 80 const uint32_t *src = (const uint32_t*)psrc;
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81 uint32_t val;
82 for (w = 0; w < avctx->width - 5; w += 6) {
83 READ_PIXELS(u, y, v);
84 READ_PIXELS(y, u, y);
85 READ_PIXELS(v, y, u);
86 READ_PIXELS(y, v, y);
87 }
88 if (w < avctx->width - 1) {
89 READ_PIXELS(u, y, v);
90
8fc0162a 91 val = av_le2ne32(*src++);
08fa23d6 92 *y++ = val & 0x3FF;
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93 }
94 if (w < avctx->width - 3) {
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95 *u++ = (val >> 10) & 0x3FF;
96 *y++ = (val >> 20) & 0x3FF;
ca0bb1c4 97
8fc0162a 98 val = av_le2ne32(*src++);
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99 *v++ = val & 0x3FF;
100 *y++ = (val >> 10) & 0x3FF;
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101 }
102
103 psrc += stride;
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104 y += pic->linesize[0] / 2 - avctx->width;
105 u += pic->linesize[1] / 2 - avctx->width / 2;
106 v += pic->linesize[2] / 2 - avctx->width / 2;
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107 }
108
109 *data_size = sizeof(AVFrame);
110 *(AVFrame*)data = *avctx->coded_frame;
111
112 return avpkt->size;
113}
114
115static av_cold int decode_close(AVCodecContext *avctx)
116{
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117 AVFrame *pic = avctx->coded_frame;
118 if (pic->data[0])
119 avctx->release_buffer(avctx, pic);
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120 av_freep(&avctx->coded_frame);
121
122 return 0;
123}
124
d36beb3f 125AVCodec ff_v210_decoder = {
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126 .name = "v210",
127 .type = AVMEDIA_TYPE_VIDEO,
128 .id = CODEC_ID_V210,
129 .init = decode_init,
130 .close = decode_close,
131 .decode = decode_frame,
132 .capabilities = CODEC_CAP_DR1,
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133 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
134};