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_RGB444LE, 12 },
62 { AV_PIX_FMT_RGB555LE, 15 },
63 { AV_PIX_FMT_RGB555LE, 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 avpriv_find_pix_fmt(const PixelFormatTag *tags,
86 while (tags->pix_fmt >= 0) {
87 if (tags->fourcc == fourcc)
91 return AV_PIX_FMT_NONE;
94 #if LIBAVCODEC_VERSION_MAJOR < 55
95 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
97 return avpriv_find_pix_fmt(tags, fourcc);
101 static av_cold int raw_init_decoder(AVCodecContext *avctx)
103 RawVideoContext *context = avctx->priv_data;
105 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
106 || avctx->codec_tag == MKTAG('N','O','1','6'))
107 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
108 avctx->bits_per_coded_sample);
109 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
110 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
111 avctx->bits_per_coded_sample);
112 else if (avctx->codec_tag)
113 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
114 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
115 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
116 avctx->bits_per_coded_sample);
118 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
119 av_log(avctx, AV_LOG_ERROR, "Pixel format was not specified and cannot be detected\n");
120 return AVERROR(EINVAL);
123 avpriv_set_systematic_pal2(context->palette, avctx->pix_fmt);
124 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
125 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
126 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
127 context->length = avpicture_get_size(avctx->pix_fmt,
128 FFALIGN(avctx->width, 16),
130 if (context->length < 0)
131 return context->length;
132 context->buffer = av_malloc(context->length);
133 if (!context->buffer)
134 return AVERROR(ENOMEM);
136 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
137 if (context->length < 0)
138 return context->length;
140 context->pic.pict_type = AV_PICTURE_TYPE_I;
141 context->pic.key_frame = 1;
143 avctx->coded_frame = &context->pic;
145 if ((avctx->extradata_size >= 9 &&
146 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
147 avctx->codec_tag == MKTAG('c','y','u','v') ||
148 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
149 avctx->codec_tag == MKTAG('W','R','A','W'))
152 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /*we have interlaced material flagged in container */
153 avctx->coded_frame->interlaced_frame = 1;
154 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
155 avctx->coded_frame->top_field_first = 1;
162 static void flip(AVCodecContext *avctx, AVPicture *picture)
164 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
165 picture->linesize[0] *= -1;
168 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
171 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
172 RawVideoContext *context = avctx->priv_data;
173 const uint8_t *buf = avpkt->data;
174 int buf_size = avpkt->size;
175 int linesize_align = 4;
178 AVFrame *frame = data;
179 AVPicture *picture = data;
181 frame->pict_type = avctx->coded_frame->pict_type;
182 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
183 frame->top_field_first = avctx->coded_frame->top_field_first;
184 frame->reordered_opaque = avctx->reordered_opaque;
185 frame->pkt_pts = avctx->pkt->pts;
186 frame->pkt_pos = avctx->pkt->pos;
187 frame->pkt_duration = avctx->pkt->duration;
189 if (context->tff >= 0) {
190 frame->interlaced_frame = 1;
191 frame->top_field_first = context->tff;
194 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
197 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
198 if (context->buffer) {
200 uint8_t *dst = context->buffer;
201 buf_size = context->length - AVPALETTE_SIZE;
202 if (avctx->bits_per_coded_sample == 4) {
203 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
204 dst[2 * i + 0] = buf[i] >> 4;
205 dst[2 * i + 1] = buf[i] & 15;
209 av_assert0(avctx->bits_per_coded_sample == 2);
210 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
211 dst[4 * i + 0] = buf[i] >> 6;
212 dst[4 * i + 1] = buf[i] >> 4 & 3;
213 dst[4 * i + 2] = buf[i] >> 2 & 3;
214 dst[4 * i + 3] = buf[i] & 3;
221 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
222 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
223 buf += buf_size - context->length;
225 len = context->length - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
226 if (buf_size < len) {
227 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected length %d\n", buf_size, len);
228 return AVERROR(EINVAL);
231 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
232 avctx->width, avctx->height)) < 0)
234 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->length) ||
235 (desc->flags & PIX_FMT_PSEUDOPAL)) {
236 frame->data[1] = (uint8_t*)context->palette;
238 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
239 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
243 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
244 frame->palette_has_changed = 1;
247 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
248 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
249 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
250 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
251 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
252 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
253 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
254 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
255 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
257 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
258 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
259 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
260 int la0 = FFALIGN(frame->linesize[0], linesize_align);
261 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
262 frame->linesize[0] = la0;
263 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
267 flip(avctx, picture);
269 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
270 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
271 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
272 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
273 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
275 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
276 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
277 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
280 if (avctx->codec_tag == AV_RL32("yuv2") &&
281 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
283 uint8_t *line = picture->data[0];
284 for (y = 0; y < avctx->height; y++) {
285 for (x = 0; x < avctx->width; x++)
286 line[2 * x + 1] ^= 0x80;
287 line += picture->linesize[0];
290 if (avctx->codec_tag == AV_RL32("YVYU") &&
291 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
293 uint8_t *line = picture->data[0];
294 for(y = 0; y < avctx->height; y++) {
295 for(x = 0; x < avctx->width - 1; x += 2)
296 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
297 line += picture->linesize[0];
305 static av_cold int raw_close_decoder(AVCodecContext *avctx)
307 RawVideoContext *context = avctx->priv_data;
309 av_freep(&context->buffer);
313 AVCodec ff_rawvideo_decoder = {
315 .type = AVMEDIA_TYPE_VIDEO,
316 .id = AV_CODEC_ID_RAWVIDEO,
317 .priv_data_size = sizeof(RawVideoContext),
318 .init = raw_init_decoder,
319 .close = raw_close_decoder,
320 .decode = raw_decode,
321 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
322 .priv_class = &class,