Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / v210dec.c
CommitLineData
2ba45a60
DM
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 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
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 *
14 * FFmpeg is distributed in the hope that it will be useful,
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
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include "avcodec.h"
25#include "internal.h"
26#include "v210dec.h"
27#include "libavutil/bswap.h"
28#include "libavutil/internal.h"
29#include "libavutil/mem.h"
30
31#define READ_PIXELS(a, b, c) \
32 do { \
33 val = av_le2ne32(*src++); \
34 *a++ = val & 0x3FF; \
35 *b++ = (val >> 10) & 0x3FF; \
36 *c++ = (val >> 20) & 0x3FF; \
37 } while (0)
38
39static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
40{
41 uint32_t val;
42 int i;
43
44 for( i = 0; i < width-5; i += 6 ){
45 READ_PIXELS(u, y, v);
46 READ_PIXELS(y, u, y);
47 READ_PIXELS(v, y, u);
48 READ_PIXELS(y, v, y);
49 }
50}
51
52static av_cold int decode_init(AVCodecContext *avctx)
53{
54 V210DecContext *s = avctx->priv_data;
55
56 if (avctx->width & 1) {
57 av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
58 return AVERROR_INVALIDDATA;
59 }
60 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
61 avctx->bits_per_raw_sample = 10;
62
63 s->unpack_frame = v210_planar_unpack_c;
64
65 if (HAVE_MMX)
66 v210_x86_init(s);
67
68 return 0;
69}
70
71static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
72 AVPacket *avpkt)
73{
74 V210DecContext *s = avctx->priv_data;
75
76 int h, w, ret, stride, aligned_input;
77 AVFrame *pic = data;
78 const uint8_t *psrc = avpkt->data;
79 uint16_t *y, *u, *v;
80
81 if (s->custom_stride )
82 stride = s->custom_stride;
83 else {
84 int aligned_width = ((avctx->width + 47) / 48) * 48;
85 stride = aligned_width * 8 / 3;
86 }
87
88 if (avpkt->size < stride * avctx->height) {
89 if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
90 stride = avpkt->size / avctx->height;
91 if (!s->stride_warning_shown)
92 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
93 s->stride_warning_shown = 1;
94 } else {
95 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
96 return AVERROR_INVALIDDATA;
97 }
98 }
99
100 aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
101 if (aligned_input != s->aligned_input) {
102 s->aligned_input = aligned_input;
103 if (HAVE_MMX)
104 v210_x86_init(s);
105 }
106
107 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
108 return ret;
109
110 y = (uint16_t*)pic->data[0];
111 u = (uint16_t*)pic->data[1];
112 v = (uint16_t*)pic->data[2];
113 pic->pict_type = AV_PICTURE_TYPE_I;
114 pic->key_frame = 1;
115
116 for (h = 0; h < avctx->height; h++) {
117 const uint32_t *src = (const uint32_t*)psrc;
118 uint32_t val;
119
120 w = (avctx->width / 6) * 6;
121 s->unpack_frame(src, y, u, v, w);
122
123 y += w;
124 u += w >> 1;
125 v += w >> 1;
126 src += (w << 1) / 3;
127
128 if (w < avctx->width - 1) {
129 READ_PIXELS(u, y, v);
130
131 val = av_le2ne32(*src++);
132 *y++ = val & 0x3FF;
133 if (w < avctx->width - 3) {
134 *u++ = (val >> 10) & 0x3FF;
135 *y++ = (val >> 20) & 0x3FF;
136
137 val = av_le2ne32(*src++);
138 *v++ = val & 0x3FF;
139 *y++ = (val >> 10) & 0x3FF;
140 }
141 }
142
143 psrc += stride;
144 y += pic->linesize[0] / 2 - avctx->width;
145 u += pic->linesize[1] / 2 - avctx->width / 2;
146 v += pic->linesize[2] / 2 - avctx->width / 2;
147 }
148
149 if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
150 /* we have interlaced material flagged in container */
151 pic->interlaced_frame = 1;
152 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
153 pic->top_field_first = 1;
154 }
155
156 *got_frame = 1;
157
158 return avpkt->size;
159}
160
161#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
162static const AVOption v210dec_options[] = {
163 {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), FF_OPT_TYPE_INT,
164 {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
165 {NULL}
166};
167
168static const AVClass v210dec_class = {
169 "V210 Decoder",
170 av_default_item_name,
171 v210dec_options,
172 LIBAVUTIL_VERSION_INT,
173};
174
175AVCodec ff_v210_decoder = {
176 .name = "v210",
177 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
178 .type = AVMEDIA_TYPE_VIDEO,
179 .id = AV_CODEC_ID_V210,
180 .priv_data_size = sizeof(V210DecContext),
181 .init = decode_init,
182 .decode = decode_frame,
183 .capabilities = CODEC_CAP_DR1,
184 .priv_class = &v210dec_class,
185};