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
29 #include "libavutil/avassert.h"
30 #include "libavutil/common.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
35 typedef struct RawVideoContext {
37 uint32_t palette[AVPALETTE_COUNT];
38 unsigned char * buffer; /* block of memory for holding one frame */
39 int length; /* number of bytes in buffer */
41 AVFrame pic; ///< AVCodecContext.coded_frame
45 static const AVOption options[]={
46 {"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM},
50 static const AVClass class = {
51 .class_name = "rawdec",
53 .version = LIBAVUTIL_VERSION_INT,
56 static const PixelFormatTag pix_fmt_bps_avi[] = {
57 { AV_PIX_FMT_MONOWHITE, 1 },
58 { AV_PIX_FMT_PAL8, 2 },
59 { AV_PIX_FMT_PAL8, 4 },
60 { AV_PIX_FMT_PAL8, 8 },
61 { AV_PIX_FMT_RGB444, 12 },
62 { AV_PIX_FMT_RGB555, 15 },
63 { AV_PIX_FMT_RGB555, 16 },
64 { AV_PIX_FMT_BGR24, 24 },
65 { AV_PIX_FMT_BGRA, 32 },
66 { AV_PIX_FMT_NONE, 0 },
69 static const PixelFormatTag pix_fmt_bps_mov[] = {
70 { AV_PIX_FMT_MONOWHITE, 1 },
71 { AV_PIX_FMT_PAL8, 2 },
72 { AV_PIX_FMT_PAL8, 4 },
73 { AV_PIX_FMT_PAL8, 8 },
74 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
75 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
76 { AV_PIX_FMT_RGB555BE, 16 },
77 { AV_PIX_FMT_RGB24, 24 },
78 { AV_PIX_FMT_ARGB, 32 },
79 { AV_PIX_FMT_MONOWHITE,33 },
80 { AV_PIX_FMT_NONE, 0 },
83 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
85 while (tags->pix_fmt >= 0) {
86 if (tags->fourcc == fourcc)
90 return AV_PIX_FMT_YUV420P;
93 static av_cold int raw_init_decoder(AVCodecContext *avctx)
95 RawVideoContext *context = avctx->priv_data;
97 if (avctx->codec_tag == MKTAG('r','a','w',' ') || avctx->codec_tag == MKTAG('N','O','1','6'))
98 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
99 else if (avctx->codec_tag == MKTAG('W','R','A','W'))
100 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
101 else if (avctx->codec_tag)
102 avctx->pix_fmt = ff_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
103 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
104 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
106 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
107 av_log(avctx, AV_LOG_ERROR, "Pixel format was not specified and cannot be detected\n");
108 return AVERROR(EINVAL);
111 avpriv_set_systematic_pal2(context->palette, avctx->pix_fmt);
112 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
113 avctx->pix_fmt==AV_PIX_FMT_PAL8 &&
114 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
115 context->length = avpicture_get_size(avctx->pix_fmt, FFALIGN(avctx->width, 16), avctx->height);
116 if (context->length < 0)
117 return context->length;
118 context->buffer = av_malloc(context->length);
119 if (!context->buffer)
120 return AVERROR(ENOMEM);
122 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
123 if (context->length < 0)
124 return context->length;
126 context->pic.pict_type = AV_PICTURE_TYPE_I;
127 context->pic.key_frame = 1;
129 avctx->coded_frame= &context->pic;
131 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
132 avctx->codec_tag == MKTAG('c','y','u','v') ||
133 avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W'))
136 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /*we have interlaced material flagged in container */
137 avctx->coded_frame->interlaced_frame = 1;
138 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
139 avctx->coded_frame->top_field_first = 1;
146 static void flip(AVCodecContext *avctx, AVPicture * picture){
147 picture->data[0] += picture->linesize[0] * (avctx->height-1);
148 picture->linesize[0] *= -1;
151 static int raw_decode(AVCodecContext *avctx,
152 void *data, int *data_size,
155 const uint8_t *buf = avpkt->data;
156 int buf_size = avpkt->size;
157 int linesize_align = 4;
158 RawVideoContext *context = avctx->priv_data;
159 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
162 AVFrame *frame = data;
163 AVPicture *picture = data;
165 frame->pict_type = avctx->coded_frame->pict_type;
166 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
167 frame->top_field_first = avctx->coded_frame->top_field_first;
168 frame->reordered_opaque = avctx->reordered_opaque;
169 frame->pkt_pts = avctx->pkt->pts;
170 frame->pkt_pos = avctx->pkt->pos;
171 frame->pkt_duration = avctx->pkt->duration;
174 frame->interlaced_frame = 1;
175 frame->top_field_first = context->tff;
178 if (avctx->width <= 0 || avctx->height <= 0) {
179 av_log(avctx, AV_LOG_ERROR, "w/h is invalid\n");
180 return AVERROR(EINVAL);
183 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
184 if (context->buffer) {
186 uint8_t *dst = context->buffer;
187 buf_size = context->length - AVPALETTE_SIZE;
188 if (avctx->bits_per_coded_sample == 4){
189 for(i=0; 2*i+1 < buf_size && i<avpkt->size; i++){
190 dst[2*i+0]= buf[i]>>4;
191 dst[2*i+1]= buf[i]&15;
195 av_assert0(avctx->bits_per_coded_sample == 2);
196 for(i=0; 4*i+3 < buf_size && i<avpkt->size; i++){
197 dst[4*i+0]= buf[i]>>6;
198 dst[4*i+1]= buf[i]>>4&3;
199 dst[4*i+2]= buf[i]>>2&3;
200 dst[4*i+3]= buf[i] &3;
207 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
208 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
209 buf += buf_size - context->length;
211 len = context->length - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
212 if (buf_size < len) {
213 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected length %d\n", buf_size, len);
214 return AVERROR(EINVAL);
217 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
218 avctx->width, avctx->height)) < 0)
220 if((avctx->pix_fmt==AV_PIX_FMT_PAL8 && buf_size < context->length) ||
221 (desc->flags & PIX_FMT_PSEUDOPAL)) {
222 frame->data[1]= (uint8_t*)context->palette;
224 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
225 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
228 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
229 frame->palette_has_changed = 1;
232 if((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
233 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
234 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
235 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
236 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
237 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
238 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
239 FFALIGN(frame->linesize[0], linesize_align)*avctx->height <= buf_size)
240 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
243 flip(avctx, picture);
245 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
246 || avctx->codec_tag == MKTAG('Y', 'V', '1', '6')
247 || avctx->codec_tag == MKTAG('Y', 'V', '2', '4')
248 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
249 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
251 if(avctx->codec_tag == AV_RL32("yuv2") &&
252 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
254 uint8_t *line = picture->data[0];
255 for(y = 0; y < avctx->height; y++) {
256 for(x = 0; x < avctx->width; x++)
257 line[2*x + 1] ^= 0x80;
258 line += picture->linesize[0];
261 if(avctx->codec_tag == AV_RL32("YVYU") &&
262 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
264 uint8_t *line = picture->data[0];
265 for(y = 0; y < avctx->height; y++) {
266 for(x = 0; x < avctx->width - 1; x += 2)
267 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
268 line += picture->linesize[0];
272 *data_size = sizeof(AVPicture);
276 static av_cold int raw_close_decoder(AVCodecContext *avctx)
278 RawVideoContext *context = avctx->priv_data;
280 av_freep(&context->buffer);
284 AVCodec ff_rawvideo_decoder = {
286 .type = AVMEDIA_TYPE_VIDEO,
287 .id = AV_CODEC_ID_RAWVIDEO,
288 .priv_data_size = sizeof(RawVideoContext),
289 .init = raw_init_decoder,
290 .close = raw_close_decoder,
291 .decode = raw_decode,
292 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
293 .priv_class = &class,