Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf.
[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 "imgconvert.h"
29 #include "raw.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavcore/imgutils.h"
32 #include "libavcore/internal.h"
33
34 typedef struct RawVideoContext {
35 uint32_t palette[AVPALETTE_COUNT];
36 unsigned char * buffer; /* block of memory for holding one frame */
37 int length; /* number of bytes in buffer */
38 int flip;
39 AVFrame pic; ///< AVCodecContext.coded_frame
40 } RawVideoContext;
41
42 static const PixelFormatTag pix_fmt_bps_avi[] = {
43 { PIX_FMT_PAL8, 4 },
44 { PIX_FMT_PAL8, 8 },
45 { PIX_FMT_RGB444, 12 },
46 { PIX_FMT_RGB555, 15 },
47 { PIX_FMT_RGB555, 16 },
48 { PIX_FMT_BGR24, 24 },
49 { PIX_FMT_RGB32, 32 },
50 { PIX_FMT_NONE, 0 },
51 };
52
53 static const PixelFormatTag pix_fmt_bps_mov[] = {
54 { PIX_FMT_MONOWHITE, 1 },
55 { PIX_FMT_PAL8, 2 },
56 { PIX_FMT_PAL8, 4 },
57 { PIX_FMT_PAL8, 8 },
58 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
59 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
60 { PIX_FMT_RGB555BE, 16 },
61 { PIX_FMT_RGB24, 24 },
62 { PIX_FMT_ARGB, 32 },
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)
83 avctx->pix_fmt = find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
84 else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
85 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
86
87 ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
88 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
89 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
90 avctx->pix_fmt==PIX_FMT_PAL8 &&
91 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
92 context->buffer = av_malloc(context->length);
93 if (!context->buffer)
94 return -1;
95 }
96 context->pic.pict_type = FF_I_TYPE;
97 context->pic.key_frame = 1;
98
99 avctx->coded_frame= &context->pic;
100
101 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
102 avctx->codec_tag == MKTAG( 3 , 0 , 0 , 0 ))
103 context->flip=1;
104
105 return 0;
106 }
107
108 static void flip(AVCodecContext *avctx, AVPicture * picture){
109 picture->data[0] += picture->linesize[0] * (avctx->height-1);
110 picture->linesize[0] *= -1;
111 }
112
113 static int raw_decode(AVCodecContext *avctx,
114 void *data, int *data_size,
115 AVPacket *avpkt)
116 {
117 const uint8_t *buf = avpkt->data;
118 int buf_size = avpkt->size;
119 RawVideoContext *context = avctx->priv_data;
120
121 AVFrame * frame = (AVFrame *) data;
122 AVPicture * picture = (AVPicture *) data;
123
124 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
125 frame->top_field_first = avctx->coded_frame->top_field_first;
126 frame->reordered_opaque = avctx->reordered_opaque;
127
128 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
129 if (context->buffer) {
130 int i;
131 uint8_t *dst = context->buffer;
132 buf_size = context->length - 256*4;
133 if (avctx->bits_per_coded_sample == 4){
134 for(i=0; 2*i+1 < buf_size; i++){
135 dst[2*i+0]= buf[i]>>4;
136 dst[2*i+1]= buf[i]&15;
137 }
138 } else
139 for(i=0; 4*i+3 < buf_size; i++){
140 dst[4*i+0]= buf[i]>>6;
141 dst[4*i+1]= buf[i]>>4&3;
142 dst[4*i+2]= buf[i]>>2&3;
143 dst[4*i+3]= buf[i] &3;
144 }
145 buf= dst;
146 }
147
148 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
149 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
150 buf += buf_size - context->length;
151
152 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
153 return -1;
154
155 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
156 if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
157 (avctx->pix_fmt!=PIX_FMT_PAL8 &&
158 (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PAL))){
159 frame->data[1]= context->palette;
160 }
161 if (avctx->palctrl && avctx->palctrl->palette_changed) {
162 memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
163 avctx->palctrl->palette_changed = 0;
164 }
165 if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size)
166 frame->linesize[0] = (frame->linesize[0]+3)&~3;
167
168 if(context->flip)
169 flip(avctx, picture);
170
171 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
172 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
173 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
174
175 if(avctx->codec_tag == AV_RL32("yuv2") &&
176 avctx->pix_fmt == PIX_FMT_YUYV422) {
177 int x, y;
178 uint8_t *line = picture->data[0];
179 for(y = 0; y < avctx->height; y++) {
180 for(x = 0; x < avctx->width; x++)
181 line[2*x + 1] ^= 0x80;
182 line += picture->linesize[0];
183 }
184 }
185
186 *data_size = sizeof(AVPicture);
187 return buf_size;
188 }
189
190 static av_cold int raw_close_decoder(AVCodecContext *avctx)
191 {
192 RawVideoContext *context = avctx->priv_data;
193
194 av_freep(&context->buffer);
195 return 0;
196 }
197
198 AVCodec ff_rawvideo_decoder = {
199 "rawvideo",
200 AVMEDIA_TYPE_VIDEO,
201 CODEC_ID_RAWVIDEO,
202 sizeof(RawVideoContext),
203 raw_init_decoder,
204 NULL,
205 raw_close_decoder,
206 raw_decode,
207 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
208 };