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
30 #include "libavutil/avassert.h"
31 #include "libavutil/buffer.h"
32 #include "libavutil/common.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/opt.h"
37 typedef struct RawVideoContext {
40 int frame_size; /* size of the frame in bytes */
42 int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
47 static const AVOption options[]={
48 {"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},
52 static const AVClass rawdec_class = {
53 .class_name = "rawdec",
55 .version = LIBAVUTIL_VERSION_INT,
58 static const PixelFormatTag pix_fmt_bps_avi[] = {
59 { AV_PIX_FMT_MONOWHITE, 1 },
60 { AV_PIX_FMT_PAL8, 2 },
61 { AV_PIX_FMT_PAL8, 4 },
62 { AV_PIX_FMT_PAL8, 8 },
63 { AV_PIX_FMT_RGB444LE, 12 },
64 { AV_PIX_FMT_RGB555LE, 15 },
65 { AV_PIX_FMT_RGB555LE, 16 },
66 { AV_PIX_FMT_BGR24, 24 },
67 { AV_PIX_FMT_BGRA, 32 },
68 { AV_PIX_FMT_NONE, 0 },
71 static const PixelFormatTag pix_fmt_bps_mov[] = {
72 { AV_PIX_FMT_MONOWHITE, 1 },
73 { AV_PIX_FMT_PAL8, 2 },
74 { AV_PIX_FMT_PAL8, 4 },
75 { AV_PIX_FMT_PAL8, 8 },
76 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
77 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
78 { AV_PIX_FMT_RGB555BE, 16 },
79 { AV_PIX_FMT_RGB24, 24 },
80 { AV_PIX_FMT_ARGB, 32 },
81 { AV_PIX_FMT_MONOWHITE,33 },
82 { AV_PIX_FMT_NONE, 0 },
85 enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
88 while (tags->pix_fmt >= 0) {
89 if (tags->fourcc == fourcc)
93 return AV_PIX_FMT_NONE;
96 #if LIBAVCODEC_VERSION_MAJOR < 55
97 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
99 return avpriv_find_pix_fmt(tags, fourcc);
103 static av_cold int raw_init_decoder(AVCodecContext *avctx)
105 RawVideoContext *context = avctx->priv_data;
106 const AVPixFmtDescriptor *desc;
108 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
109 || avctx->codec_tag == MKTAG('N','O','1','6'))
110 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
111 avctx->bits_per_coded_sample & 0x1f);
112 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
113 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
114 avctx->bits_per_coded_sample);
115 else if (avctx->codec_tag)
116 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
117 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
118 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
119 avctx->bits_per_coded_sample);
121 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
123 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
124 return AVERROR(EINVAL);
127 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
128 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
129 if (!context->palette)
130 return AVERROR(ENOMEM);
131 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
132 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
134 memset(context->palette->data, 0, AVPALETTE_SIZE);
137 if (((avctx->bits_per_coded_sample & 0x1f) == 4 || (avctx->bits_per_coded_sample & 0x1f) == 2) &&
138 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
139 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
140 context->is_2_4_bpp = 1;
141 context->frame_size = avpicture_get_size(avctx->pix_fmt,
142 FFALIGN(avctx->width, 16),
145 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
149 if ((avctx->extradata_size >= 9 &&
150 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
151 avctx->codec_tag == MKTAG('c','y','u','v') ||
152 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
153 avctx->codec_tag == MKTAG('W','R','A','W'))
156 if (avctx->codec_tag == AV_RL32("yuv2") &&
157 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
158 context->is_yuv2 = 1;
163 static void flip(AVCodecContext *avctx, AVPicture *picture)
165 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
166 picture->linesize[0] *= -1;
169 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
172 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
173 RawVideoContext *context = avctx->priv_data;
174 const uint8_t *buf = avpkt->data;
175 int buf_size = avpkt->size;
176 int linesize_align = 4;
178 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2;
180 AVFrame *frame = data;
181 AVPicture *picture = data;
183 frame->pict_type = AV_PICTURE_TYPE_I;
184 frame->key_frame = 1;
185 frame->reordered_opaque = avctx->reordered_opaque;
186 frame->pkt_pts = avctx->internal->pkt->pts;
187 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
188 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
190 if (context->tff >= 0) {
191 frame->interlaced_frame = 1;
192 frame->top_field_first = context->tff;
195 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
199 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
201 frame->buf[0] = av_buffer_ref(avpkt->buf);
203 return AVERROR(ENOMEM);
205 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
206 if (context->is_2_4_bpp) {
208 uint8_t *dst = frame->buf[0]->data;
209 buf_size = context->frame_size - AVPALETTE_SIZE;
210 if ((avctx->bits_per_coded_sample & 0x1f) == 4) {
211 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
212 dst[2 * i + 0] = buf[i] >> 4;
213 dst[2 * i + 1] = buf[i] & 15;
217 av_assert0((avctx->bits_per_coded_sample & 0x1f) == 2);
218 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
219 dst[4 * i + 0] = buf[i] >> 6;
220 dst[4 * i + 1] = buf[i] >> 4 & 3;
221 dst[4 * i + 2] = buf[i] >> 2 & 3;
222 dst[4 * i + 3] = buf[i] & 3;
227 } else if (need_copy) {
228 memcpy(frame->buf[0]->data, buf, buf_size);
229 buf = frame->buf[0]->data;
232 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
233 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
234 buf += buf_size - context->frame_size;
236 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
237 if (buf_size < len) {
238 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
239 av_buffer_unref(&frame->buf[0]);
240 return AVERROR(EINVAL);
243 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
244 avctx->width, avctx->height)) < 0) {
245 av_buffer_unref(&frame->buf[0]);
249 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
250 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
254 av_buffer_unref(&context->palette);
255 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
256 if (!context->palette) {
257 av_buffer_unref(&frame->buf[0]);
258 return AVERROR(ENOMEM);
260 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
261 frame->palette_has_changed = 1;
265 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
266 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
267 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
268 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
269 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
270 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
271 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
272 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
273 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
275 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
276 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
277 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
278 int la0 = FFALIGN(frame->linesize[0], linesize_align);
279 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
280 frame->linesize[0] = la0;
281 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
284 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
285 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
286 frame->buf[1] = av_buffer_ref(context->palette);
287 if (!frame->buf[1]) {
288 av_buffer_unref(&frame->buf[0]);
289 return AVERROR(ENOMEM);
291 frame->data[1] = frame->buf[1]->data;
294 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
295 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
296 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
299 flip(avctx, picture);
301 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
302 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
303 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
304 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
305 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
307 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
308 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
309 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
312 if (avctx->codec_tag == AV_RL32("yuv2") &&
313 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
315 uint8_t *line = picture->data[0];
316 for (y = 0; y < avctx->height; y++) {
317 for (x = 0; x < avctx->width; x++)
318 line[2 * x + 1] ^= 0x80;
319 line += picture->linesize[0];
322 if (avctx->codec_tag == AV_RL32("YVYU") &&
323 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
325 uint8_t *line = picture->data[0];
326 for(y = 0; y < avctx->height; y++) {
327 for(x = 0; x < avctx->width - 1; x += 2)
328 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
329 line += picture->linesize[0];
333 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
334 frame->interlaced_frame = 1;
335 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
336 frame->top_field_first = 1;
343 static av_cold int raw_close_decoder(AVCodecContext *avctx)
345 RawVideoContext *context = avctx->priv_data;
347 av_buffer_unref(&context->palette);
351 AVCodec ff_rawvideo_decoder = {
353 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
354 .type = AVMEDIA_TYPE_VIDEO,
355 .id = AV_CODEC_ID_RAWVIDEO,
356 .priv_data_size = sizeof(RawVideoContext),
357 .init = raw_init_decoder,
358 .close = raw_close_decoder,
359 .decode = raw_decode,
360 .priv_class = &rawdec_class,