lavc: use designated initialisers for all codecs.
[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_NONE, 0 },
63 };
64
65 static enum PixelFormat find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
66 {
67 while (tags->pix_fmt >= 0) {
68 if (tags->fourcc == fourcc)
69 return tags->pix_fmt;
70 tags++;
71 }
72 return PIX_FMT_YUV420P;
73 }
74
75 static av_cold int raw_init_decoder(AVCodecContext *avctx)
76 {
77 RawVideoContext *context = avctx->priv_data;
78
79 if (avctx->codec_tag == MKTAG('r','a','w',' '))
80 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
81 else if (avctx->codec_tag == MKTAG('W','R','A','W'))
82 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
83 else if (avctx->codec_tag)
84 avctx->pix_fmt = find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
85 else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
86 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
87
88 ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
89 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
90 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
91 avctx->pix_fmt==PIX_FMT_PAL8 &&
92 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
93 context->buffer = av_malloc(context->length);
94 if (!context->buffer)
95 return -1;
96 }
97 context->pic.pict_type = AV_PICTURE_TYPE_I;
98 context->pic.key_frame = 1;
99
100 avctx->coded_frame= &context->pic;
101
102 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
103 avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W'))
104 context->flip=1;
105
106 return 0;
107 }
108
109 static void flip(AVCodecContext *avctx, AVPicture * picture){
110 picture->data[0] += picture->linesize[0] * (avctx->height-1);
111 picture->linesize[0] *= -1;
112 }
113
114 static int raw_decode(AVCodecContext *avctx,
115 void *data, int *data_size,
116 AVPacket *avpkt)
117 {
118 const uint8_t *buf = avpkt->data;
119 int buf_size = avpkt->size;
120 RawVideoContext *context = avctx->priv_data;
121
122 AVFrame * frame = (AVFrame *) data;
123 AVPicture * picture = (AVPicture *) data;
124
125 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
126 frame->top_field_first = avctx->coded_frame->top_field_first;
127 frame->reordered_opaque = avctx->reordered_opaque;
128 frame->pkt_pts = avctx->pkt->pts;
129
130 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
131 if (context->buffer) {
132 int i;
133 uint8_t *dst = context->buffer;
134 buf_size = context->length - 256*4;
135 if (avctx->bits_per_coded_sample == 4){
136 for(i=0; 2*i+1 < buf_size; i++){
137 dst[2*i+0]= buf[i]>>4;
138 dst[2*i+1]= buf[i]&15;
139 }
140 } else
141 for(i=0; 4*i+3 < buf_size; i++){
142 dst[4*i+0]= buf[i]>>6;
143 dst[4*i+1]= buf[i]>>4&3;
144 dst[4*i+2]= buf[i]>>2&3;
145 dst[4*i+3]= buf[i] &3;
146 }
147 buf= dst;
148 }
149
150 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
151 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
152 buf += buf_size - context->length;
153
154 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
155 return -1;
156
157 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
158 if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
159 (avctx->pix_fmt!=PIX_FMT_PAL8 &&
160 (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PAL))){
161 frame->data[1]= context->palette;
162 }
163 if (avctx->pix_fmt == PIX_FMT_PAL8) {
164 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
165
166 if (pal) {
167 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
168 frame->palette_has_changed = 1;
169 }
170 }
171 if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size)
172 frame->linesize[0] = (frame->linesize[0]+3)&~3;
173
174 if(context->flip)
175 flip(avctx, picture);
176
177 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
178 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
179 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
180
181 if(avctx->codec_tag == AV_RL32("yuv2") &&
182 avctx->pix_fmt == PIX_FMT_YUYV422) {
183 int x, y;
184 uint8_t *line = picture->data[0];
185 for(y = 0; y < avctx->height; y++) {
186 for(x = 0; x < avctx->width; x++)
187 line[2*x + 1] ^= 0x80;
188 line += picture->linesize[0];
189 }
190 }
191
192 *data_size = sizeof(AVPicture);
193 return buf_size;
194 }
195
196 static av_cold int raw_close_decoder(AVCodecContext *avctx)
197 {
198 RawVideoContext *context = avctx->priv_data;
199
200 av_freep(&context->buffer);
201 return 0;
202 }
203
204 AVCodec ff_rawvideo_decoder = {
205 .name = "rawvideo",
206 .type = AVMEDIA_TYPE_VIDEO,
207 .id = CODEC_ID_RAWVIDEO,
208 .priv_data_size = sizeof(RawVideoContext),
209 .init = raw_init_decoder,
210 .close = raw_close_decoder,
211 .decode = raw_decode,
212 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
213 };