cosmetics: Align codec declarations
[libav.git] / libavcodec / rawdec.c
1 /*
2 * Raw Video Decoder
3 * Copyright (c) 2001 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Raw Video Decoder
25 */
26
27 #include "avcodec.h"
28 #include "imgconvert.h"
29 #include "raw.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/imgutils.h"
32
33 typedef struct RawVideoContext {
34 uint32_t palette[AVPALETTE_COUNT];
35 unsigned char * buffer; /* block of memory for holding one frame */
36 int length; /* number of bytes in buffer */
37 int flip;
38 AVFrame pic; ///< AVCodecContext.coded_frame
39 } RawVideoContext;
40
41 static const PixelFormatTag pix_fmt_bps_avi[] = {
42 { PIX_FMT_PAL8, 4 },
43 { PIX_FMT_PAL8, 8 },
44 { PIX_FMT_RGB444, 12 },
45 { PIX_FMT_RGB555, 15 },
46 { PIX_FMT_RGB555, 16 },
47 { PIX_FMT_BGR24, 24 },
48 { PIX_FMT_RGB32, 32 },
49 { PIX_FMT_NONE, 0 },
50 };
51
52 static const PixelFormatTag pix_fmt_bps_mov[] = {
53 { PIX_FMT_MONOWHITE, 1 },
54 { PIX_FMT_PAL8, 2 },
55 { PIX_FMT_PAL8, 4 },
56 { PIX_FMT_PAL8, 8 },
57 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
58 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
59 { PIX_FMT_RGB555BE, 16 },
60 { PIX_FMT_RGB24, 24 },
61 { PIX_FMT_ARGB, 32 },
62 { PIX_FMT_MONOWHITE,33 },
63 { PIX_FMT_NONE, 0 },
64 };
65
66 static enum PixelFormat find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
67 {
68 while (tags->pix_fmt >= 0) {
69 if (tags->fourcc == fourcc)
70 return tags->pix_fmt;
71 tags++;
72 }
73 return PIX_FMT_YUV420P;
74 }
75
76 static av_cold int raw_init_decoder(AVCodecContext *avctx)
77 {
78 RawVideoContext *context = avctx->priv_data;
79
80 if (avctx->codec_tag == MKTAG('r','a','w',' '))
81 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
82 else if (avctx->codec_tag == MKTAG('W','R','A','W'))
83 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
84 else if (avctx->codec_tag)
85 avctx->pix_fmt = find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
86 else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
87 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
88
89 ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
90 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
91 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
92 avctx->pix_fmt==PIX_FMT_PAL8 &&
93 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
94 context->buffer = av_malloc(context->length);
95 if (!context->buffer)
96 return -1;
97 }
98 context->pic.pict_type = AV_PICTURE_TYPE_I;
99 context->pic.key_frame = 1;
100
101 avctx->coded_frame= &context->pic;
102
103 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
104 avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W'))
105 context->flip=1;
106
107 return 0;
108 }
109
110 static void flip(AVCodecContext *avctx, AVPicture * picture){
111 picture->data[0] += picture->linesize[0] * (avctx->height-1);
112 picture->linesize[0] *= -1;
113 }
114
115 static int raw_decode(AVCodecContext *avctx,
116 void *data, int *data_size,
117 AVPacket *avpkt)
118 {
119 const uint8_t *buf = avpkt->data;
120 int buf_size = avpkt->size;
121 RawVideoContext *context = avctx->priv_data;
122 int res;
123
124 AVFrame *frame = data;
125 AVPicture *picture = data;
126
127 frame->pict_type = avctx->coded_frame->pict_type;
128 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
129 frame->top_field_first = avctx->coded_frame->top_field_first;
130 frame->reordered_opaque = avctx->reordered_opaque;
131 frame->pkt_pts = avctx->pkt->pts;
132
133 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
134 return -1;
135
136 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
137 if (context->buffer) {
138 int i;
139 uint8_t *dst = context->buffer;
140 buf_size = context->length - 256*4;
141 if (avctx->bits_per_coded_sample == 4){
142 for(i=0; 2*i+1 < buf_size; i++){
143 dst[2*i+0]= buf[i]>>4;
144 dst[2*i+1]= buf[i]&15;
145 }
146 } else
147 for(i=0; 4*i+3 < buf_size; i++){
148 dst[4*i+0]= buf[i]>>6;
149 dst[4*i+1]= buf[i]>>4&3;
150 dst[4*i+2]= buf[i]>>2&3;
151 dst[4*i+3]= buf[i] &3;
152 }
153 buf= dst;
154 }
155
156 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
157 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
158 buf += buf_size - context->length;
159
160 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
161 avctx->width, avctx->height)) < 0)
162 return res;
163 if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
164 (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PSEUDOPAL)) {
165 frame->data[1]= context->palette;
166 }
167 if (avctx->pix_fmt == PIX_FMT_PAL8) {
168 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
169
170 if (pal) {
171 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
172 frame->palette_has_changed = 1;
173 }
174 }
175 if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size)
176 frame->linesize[0] = (frame->linesize[0]+3)&~3;
177
178 if(context->flip)
179 flip(avctx, picture);
180
181 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
182 || avctx->codec_tag == MKTAG('Y', 'V', '1', '6')
183 || avctx->codec_tag == MKTAG('Y', 'V', '2', '4')
184 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
185 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
186
187 if(avctx->codec_tag == AV_RL32("yuv2") &&
188 avctx->pix_fmt == PIX_FMT_YUYV422) {
189 int x, y;
190 uint8_t *line = picture->data[0];
191 for(y = 0; y < avctx->height; y++) {
192 for(x = 0; x < avctx->width; x++)
193 line[2*x + 1] ^= 0x80;
194 line += picture->linesize[0];
195 }
196 }
197
198 *data_size = sizeof(AVPicture);
199 return buf_size;
200 }
201
202 static av_cold int raw_close_decoder(AVCodecContext *avctx)
203 {
204 RawVideoContext *context = avctx->priv_data;
205
206 av_freep(&context->buffer);
207 return 0;
208 }
209
210 AVCodec ff_rawvideo_decoder = {
211 .name = "rawvideo",
212 .type = AVMEDIA_TYPE_VIDEO,
213 .id = CODEC_ID_RAWVIDEO,
214 .priv_data_size = sizeof(RawVideoContext),
215 .init = raw_init_decoder,
216 .close = raw_close_decoder,
217 .decode = raw_decode,
218 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
219 };