3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
28 #include "imgconvert.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/opt.h"
34 typedef struct RawVideoContext {
36 uint32_t palette[AVPALETTE_COUNT];
37 unsigned char * buffer; /* block of memory for holding one frame */
38 int length; /* number of bytes in buffer */
40 AVFrame pic; ///< AVCodecContext.coded_frame
44 static const AVOption options[]={
45 {"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_INT, {.dbl = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM},
48 static const AVClass class = { "rawdec", NULL, options, LIBAVUTIL_VERSION_INT };
50 static const PixelFormatTag pix_fmt_bps_avi[] = {
51 { PIX_FMT_MONOWHITE, 1 },
55 { PIX_FMT_RGB444, 12 },
56 { PIX_FMT_RGB555, 15 },
57 { PIX_FMT_RGB555, 16 },
58 { PIX_FMT_BGR24, 24 },
63 static const PixelFormatTag pix_fmt_bps_mov[] = {
64 { PIX_FMT_MONOWHITE, 1 },
68 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
69 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
70 { PIX_FMT_RGB555BE, 16 },
71 { PIX_FMT_RGB24, 24 },
73 { PIX_FMT_MONOWHITE,33 },
77 enum PixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
79 while (tags->pix_fmt >= 0) {
80 if (tags->fourcc == fourcc)
84 return PIX_FMT_YUV420P;
87 static av_cold int raw_init_decoder(AVCodecContext *avctx)
89 RawVideoContext *context = avctx->priv_data;
91 if (avctx->codec_tag == MKTAG('r','a','w',' '))
92 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
93 else if (avctx->codec_tag == MKTAG('W','R','A','W'))
94 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
95 else if (avctx->codec_tag)
96 avctx->pix_fmt = ff_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
97 else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
98 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
100 if (avctx->pix_fmt == PIX_FMT_NONE) {
101 av_log(avctx, AV_LOG_ERROR, "Pixel format was not specified and cannot be detected\n");
102 return AVERROR(EINVAL);
105 ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
106 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
107 avctx->pix_fmt==PIX_FMT_PAL8 &&
108 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
109 context->length = avpicture_get_size(avctx->pix_fmt, FFALIGN(avctx->width, 16), avctx->height);
110 context->buffer = av_malloc(context->length);
111 if (!context->buffer)
114 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
116 context->pic.pict_type = AV_PICTURE_TYPE_I;
117 context->pic.key_frame = 1;
119 avctx->coded_frame= &context->pic;
121 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
122 avctx->codec_tag == MKTAG('c','y','u','v') ||
123 avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W'))
129 static void flip(AVCodecContext *avctx, AVPicture * picture){
130 picture->data[0] += picture->linesize[0] * (avctx->height-1);
131 picture->linesize[0] *= -1;
134 static int raw_decode(AVCodecContext *avctx,
135 void *data, int *data_size,
138 const uint8_t *buf = avpkt->data;
139 int buf_size = avpkt->size;
140 int linesize_align = 4;
141 RawVideoContext *context = avctx->priv_data;
144 AVFrame *frame = data;
145 AVPicture *picture = data;
147 frame->pict_type = avctx->coded_frame->pict_type;
148 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
149 frame->top_field_first = avctx->coded_frame->top_field_first;
150 frame->reordered_opaque = avctx->reordered_opaque;
151 frame->pkt_pts = avctx->pkt->pts;
152 frame->pkt_pos = avctx->pkt->pos;
155 frame->interlaced_frame = 1;
156 frame->top_field_first = context->tff;
159 if (avctx->width <= 0 || avctx->height <= 0) {
160 av_log(avctx, AV_LOG_ERROR, "w/h is invalid\n");
161 return AVERROR(EINVAL);
164 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
165 if (context->buffer) {
167 uint8_t *dst = context->buffer;
168 buf_size = context->length - 256*4;
169 if (avctx->bits_per_coded_sample == 4){
170 for(i=0; 2*i+1 < buf_size && i<avpkt->size; i++){
171 dst[2*i+0]= buf[i]>>4;
172 dst[2*i+1]= buf[i]&15;
176 for(i=0; 4*i+3 < buf_size && i<avpkt->size; i++){
177 dst[4*i+0]= buf[i]>>6;
178 dst[4*i+1]= buf[i]>>4&3;
179 dst[4*i+2]= buf[i]>>2&3;
180 dst[4*i+3]= buf[i] &3;
187 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
188 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
189 buf += buf_size - context->length;
191 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
194 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
195 avctx->width, avctx->height)) < 0)
197 if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
198 (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PSEUDOPAL)) {
199 frame->data[1]= context->palette;
201 if (avctx->pix_fmt == PIX_FMT_PAL8) {
202 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
205 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
206 frame->palette_has_changed = 1;
209 if((avctx->pix_fmt==PIX_FMT_BGR24 ||
210 avctx->pix_fmt==PIX_FMT_GRAY8 ||
211 avctx->pix_fmt==PIX_FMT_RGB555LE ||
212 avctx->pix_fmt==PIX_FMT_RGB555BE ||
213 avctx->pix_fmt==PIX_FMT_RGB565LE ||
214 avctx->pix_fmt==PIX_FMT_MONOWHITE ||
215 avctx->pix_fmt==PIX_FMT_PAL8) &&
216 FFALIGN(frame->linesize[0], linesize_align)*avctx->height <= buf_size)
217 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
220 flip(avctx, picture);
222 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
223 || avctx->codec_tag == MKTAG('Y', 'V', '1', '6')
224 || avctx->codec_tag == MKTAG('Y', 'V', '2', '4')
225 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
226 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
228 if(avctx->codec_tag == AV_RL32("yuv2") &&
229 avctx->pix_fmt == PIX_FMT_YUYV422) {
231 uint8_t *line = picture->data[0];
232 for(y = 0; y < avctx->height; y++) {
233 for(x = 0; x < avctx->width; x++)
234 line[2*x + 1] ^= 0x80;
235 line += picture->linesize[0];
238 if(avctx->codec_tag == AV_RL32("YVYU") &&
239 avctx->pix_fmt == PIX_FMT_YUYV422) {
241 uint8_t *line = picture->data[0];
242 for(y = 0; y < avctx->height; y++) {
243 for(x = 0; x < avctx->width - 1; x += 2)
244 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
245 line += picture->linesize[0];
249 *data_size = sizeof(AVPicture);
253 static av_cold int raw_close_decoder(AVCodecContext *avctx)
255 RawVideoContext *context = avctx->priv_data;
257 av_freep(&context->buffer);
261 AVCodec ff_rawvideo_decoder = {
263 .type = AVMEDIA_TYPE_VIDEO,
264 .id = CODEC_ID_RAWVIDEO,
265 .priv_data_size = sizeof(RawVideoContext),
266 .init = raw_init_decoder,
267 .close = raw_close_decoder,
268 .decode = raw_decode,
269 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
270 .priv_class = &class,