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/buffer.h"
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/imgutils.h"
34 #include "libavutil/opt.h"
36 typedef struct RawVideoContext {
39 int frame_size; /* size of the frame in bytes */
41 int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
46 static const AVOption options[]={
47 {"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},
51 static const AVClass rawdec_class = {
52 .class_name = "rawdec",
54 .version = LIBAVUTIL_VERSION_INT,
57 static const PixelFormatTag pix_fmt_bps_avi[] = {
58 { AV_PIX_FMT_MONOWHITE, 1 },
59 { AV_PIX_FMT_PAL8, 2 },
60 { AV_PIX_FMT_PAL8, 4 },
61 { AV_PIX_FMT_PAL8, 8 },
62 { AV_PIX_FMT_RGB444LE, 12 },
63 { AV_PIX_FMT_RGB555LE, 15 },
64 { AV_PIX_FMT_RGB555LE, 16 },
65 { AV_PIX_FMT_BGR24, 24 },
66 { AV_PIX_FMT_BGRA, 32 },
67 { AV_PIX_FMT_NONE, 0 },
70 static const PixelFormatTag pix_fmt_bps_mov[] = {
71 { AV_PIX_FMT_MONOWHITE, 1 },
72 { AV_PIX_FMT_PAL8, 2 },
73 { AV_PIX_FMT_PAL8, 4 },
74 { AV_PIX_FMT_PAL8, 8 },
75 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
76 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
77 { AV_PIX_FMT_RGB555BE, 16 },
78 { AV_PIX_FMT_RGB24, 24 },
79 { AV_PIX_FMT_ARGB, 32 },
80 { AV_PIX_FMT_MONOWHITE,33 },
81 { AV_PIX_FMT_NONE, 0 },
84 enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
87 while (tags->pix_fmt >= 0) {
88 if (tags->fourcc == fourcc)
92 return AV_PIX_FMT_NONE;
95 #if LIBAVCODEC_VERSION_MAJOR < 55
96 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
98 return avpriv_find_pix_fmt(tags, fourcc);
102 static av_cold int raw_init_decoder(AVCodecContext *avctx)
104 RawVideoContext *context = avctx->priv_data;
105 const AVPixFmtDescriptor *desc;
107 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
108 || avctx->codec_tag == MKTAG('N','O','1','6'))
109 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
110 avctx->bits_per_coded_sample);
111 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
112 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
113 avctx->bits_per_coded_sample);
114 else if (avctx->codec_tag)
115 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
116 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
117 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
118 avctx->bits_per_coded_sample);
120 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
122 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
123 return AVERROR(EINVAL);
126 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
127 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
128 if (!context->palette)
129 return AVERROR(ENOMEM);
130 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
131 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
133 memset(context->palette->data, 0, AVPALETTE_SIZE);
136 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
137 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
138 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
139 context->is_2_4_bpp = 1;
140 context->frame_size = avpicture_get_size(avctx->pix_fmt,
141 FFALIGN(avctx->width, 16),
144 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
148 if ((avctx->extradata_size >= 9 &&
149 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
150 avctx->codec_tag == MKTAG('c','y','u','v') ||
151 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
152 avctx->codec_tag == MKTAG('W','R','A','W'))
155 if (avctx->codec_tag == AV_RL32("yuv2") &&
156 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
157 context->is_yuv2 = 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;
177 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2;
179 AVFrame *frame = data;
180 AVPicture *picture = data;
182 frame->pict_type = AV_PICTURE_TYPE_I;
183 frame->key_frame = 1;
184 frame->reordered_opaque = avctx->reordered_opaque;
185 frame->pkt_pts = avctx->pkt->pts;
186 av_frame_set_pkt_pos (frame, avctx->pkt->pos);
187 av_frame_set_pkt_duration(frame, 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)
198 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
200 frame->buf[0] = av_buffer_ref(avpkt->buf);
202 return AVERROR(ENOMEM);
204 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
205 if (context->is_2_4_bpp) {
207 uint8_t *dst = frame->buf[0]->data;
208 buf_size = context->frame_size - AVPALETTE_SIZE;
209 if (avctx->bits_per_coded_sample == 4) {
210 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
211 dst[2 * i + 0] = buf[i] >> 4;
212 dst[2 * i + 1] = buf[i] & 15;
216 av_assert0(avctx->bits_per_coded_sample == 2);
217 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
218 dst[4 * i + 0] = buf[i] >> 6;
219 dst[4 * i + 1] = buf[i] >> 4 & 3;
220 dst[4 * i + 2] = buf[i] >> 2 & 3;
221 dst[4 * i + 3] = buf[i] & 3;
226 } else if (need_copy) {
227 memcpy(frame->buf[0]->data, buf, buf_size);
228 buf = frame->buf[0]->data;
231 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
232 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
233 buf += buf_size - context->frame_size;
235 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
236 if (buf_size < len) {
237 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
238 av_buffer_unref(&frame->buf[0]);
239 return AVERROR(EINVAL);
242 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
243 avctx->width, avctx->height)) < 0) {
244 av_buffer_unref(&frame->buf[0]);
248 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
249 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
253 av_buffer_unref(&context->palette);
254 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
255 if (!context->palette) {
256 av_buffer_unref(&frame->buf[0]);
257 return AVERROR(ENOMEM);
259 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
260 frame->palette_has_changed = 1;
264 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
265 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
266 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
267 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
268 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
269 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
270 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
271 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
272 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
274 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
275 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
276 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
277 int la0 = FFALIGN(frame->linesize[0], linesize_align);
278 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
279 frame->linesize[0] = la0;
280 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
283 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
284 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
285 frame->buf[1] = av_buffer_ref(context->palette);
286 if (!frame->buf[1]) {
287 av_buffer_unref(&frame->buf[0]);
288 return AVERROR(ENOMEM);
290 frame->data[1] = frame->buf[1]->data;
293 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
294 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
295 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
298 flip(avctx, picture);
300 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
301 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
302 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
303 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
304 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
306 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
307 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
308 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
311 if (avctx->codec_tag == AV_RL32("yuv2") &&
312 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
314 uint8_t *line = picture->data[0];
315 for (y = 0; y < avctx->height; y++) {
316 for (x = 0; x < avctx->width; x++)
317 line[2 * x + 1] ^= 0x80;
318 line += picture->linesize[0];
321 if (avctx->codec_tag == AV_RL32("YVYU") &&
322 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
324 uint8_t *line = picture->data[0];
325 for(y = 0; y < avctx->height; y++) {
326 for(x = 0; x < avctx->width - 1; x += 2)
327 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
328 line += picture->linesize[0];
332 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
333 frame->interlaced_frame = 1;
334 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
335 frame->top_field_first = 1;
342 static av_cold int raw_close_decoder(AVCodecContext *avctx)
344 RawVideoContext *context = avctx->priv_data;
346 av_buffer_unref(&context->palette);
350 AVCodec ff_rawvideo_decoder = {
352 .type = AVMEDIA_TYPE_VIDEO,
353 .id = AV_CODEC_ID_RAWVIDEO,
354 .priv_data_size = sizeof(RawVideoContext),
355 .init = raw_init_decoder,
356 .close = raw_close_decoder,
357 .decode = raw_decode,
358 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
359 .priv_class = &rawdec_class,