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