repositories / deb_ffmpeg.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / rawdec.c
CommitLineData
2ba45a60
DM		 1/*
2 * Raw Video Decoder
3 * Copyright (c) 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22/**
23 * @file
24 * Raw Video Decoder
25 */
26
27#include "avcodec.h"
28#include "bswapdsp.h"
29#include "get_bits.h"
30#include "internal.h"
31#include "raw.h"
32#include "libavutil/avassert.h"
33#include "libavutil/buffer.h"
34#include "libavutil/common.h"
35#include "libavutil/intreadwrite.h"
36#include "libavutil/imgutils.h"
37#include "libavutil/opt.h"
38
39typedef struct RawVideoContext {
40 AVClass *av_class;
41 AVBufferRef *palette;
42 int frame_size; /* size of the frame in bytes */
43 int flip;
44 int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
45 int is_yuv2;
46 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
47 int tff;
48
49 BswapDSPContext bbdsp;
50 void *bitstream_buf;
51 unsigned int bitstream_buf_size;
52} RawVideoContext;
53
54static const AVOption options[]={
55{"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},
56{NULL}
57};
58
59static const AVClass rawdec_class = {
60 .class_name = "rawdec",
61 .option = options,
62 .version = LIBAVUTIL_VERSION_INT,
63};
64
65static av_cold int raw_init_decoder(AVCodecContext *avctx)
66{
67 RawVideoContext *context = avctx->priv_data;
68 const AVPixFmtDescriptor *desc;
69
70 ff_bswapdsp_init(&context->bbdsp);
71
72 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
73 || avctx->codec_tag == MKTAG('N','O','1','6'))
74 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov,
75 avctx->bits_per_coded_sample);
76 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
77 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
78 avctx->bits_per_coded_sample);
79 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
80 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
81 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
82 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
83 avctx->bits_per_coded_sample);
84
85 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
86 if (!desc) {
87 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
88 return AVERROR(EINVAL);
89 }
90
91 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
92 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
93 if (!context->palette)
94 return AVERROR(ENOMEM);
95 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
96 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
97 else
98 memset(context->palette->data, 0, AVPALETTE_SIZE);
99 }
100
101 if ((avctx->extradata_size >= 9 &&
102 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
103 avctx->codec_tag == MKTAG('c','y','u','v') ||
104 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
105 avctx->codec_tag == MKTAG('W','R','A','W'))
106 context->flip = 1;
107
108 if (avctx->codec_tag == AV_RL32("yuv2") &&
109 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
110 context->is_yuv2 = 1;
111
112 return 0;
113}
114
115static void flip(AVCodecContext *avctx, AVPicture *picture)
116{
117 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
118 picture->linesize[0] *= -1;
119}
120
121/*
122 * Scale sample to 16-bit resolution
123 */
124#define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
125
126/**
127 * Scale buffer to 16 bits per coded sample resolution
128 */
129#define MKSCALE16(name, r16, w16) \
130static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
131{ \
132 int i; \
133 if (!packed) { \
134 for (i = 0; i + 1 < buf_size; i += 2) \
135 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
136 } else { \
137 GetBitContext gb; \
138 init_get_bits(&gb, buf, buf_size * 8); \
139 for (i = 0; i < avctx->width * avctx->height; i++) { \
140 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
141 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
142 } \
143 } \
144}
145
146MKSCALE16(scale16be, AV_RB16, AV_WB16)
147MKSCALE16(scale16le, AV_RL16, AV_WL16)
148
149static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
150 AVPacket *avpkt)
151{
152 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
153 RawVideoContext *context = avctx->priv_data;
154 const uint8_t *buf = avpkt->data;
155 int buf_size = avpkt->size;
156 int linesize_align = 4;
157 int res, len;
158 int need_copy;
159
160 AVFrame *frame = data;
161 AVPicture *picture = data;
162
163 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
164 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
165 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
166 context->is_2_4_bpp = 1;
167 context->frame_size = avpicture_get_size(avctx->pix_fmt,
168 FFALIGN(avctx->width, 16),
169 avctx->height);
170 } else {
171 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
172 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
173 avctx->height);
174 }
f6fa7814
DM		 175 if (context->frame_size < 0)
176 return context->frame_size;
177
2ba45a60
DM		 178 need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
179
180 frame->pict_type = AV_PICTURE_TYPE_I;
181 frame->key_frame = 1;
182
183 res = ff_decode_frame_props(avctx, frame);
184 if (res < 0)
185 return res;
186
187 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
188 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
189
190 if (context->tff >= 0) {
191 frame->interlaced_frame = 1;
192 frame->top_field_first = context->tff;
193 }
194
195 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
196 return res;
197
198 if (need_copy)
199 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
200 else
201 frame->buf[0] = av_buffer_ref(avpkt->buf);
202 if (!frame->buf[0])
203 return AVERROR(ENOMEM);
204
205 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
206 if (context->is_2_4_bpp) {
207 int i;
208 uint8_t *dst = frame->buf[0]->data;
209 buf_size = context->frame_size - AVPALETTE_SIZE;
210 if (avctx->bits_per_coded_sample == 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;
214 }
215 linesize_align = 8;
216 } else {
217 av_assert0(avctx->bits_per_coded_sample == 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;
223 }
224 linesize_align = 16;
225 }
226 buf = dst;
227 } else if (context->is_lt_16bpp) {
228 uint8_t *dst = frame->buf[0]->data;
229 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
230 int swap = avctx->codec_tag >> 24;
231
232 if (packed && swap) {
233 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
234 if (!context->bitstream_buf)
235 return AVERROR(ENOMEM);
236 if (swap == 16)
237 context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
238 else if (swap == 32)
239 context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
240 else
241 return AVERROR_INVALIDDATA;
242 buf = context->bitstream_buf;
243 }
244
245 if (desc->flags & AV_PIX_FMT_FLAG_BE)
246 scale16be(avctx, dst, buf, buf_size, packed);
247 else
248 scale16le(avctx, dst, buf, buf_size, packed);
249
250 buf = dst;
251 } else if (need_copy) {
252 memcpy(frame->buf[0]->data, buf, buf_size);
253 buf = frame->buf[0]->data;
254 }
255
256 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
257 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
258 buf += buf_size - context->frame_size;
259
260 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
261 if (buf_size < len && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) {
262 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
263 av_buffer_unref(&frame->buf[0]);
264 return AVERROR(EINVAL);
265 }
266
267 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
268 avctx->width, avctx->height)) < 0) {
269 av_buffer_unref(&frame->buf[0]);
270 return res;
271 }
272
273 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
274 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
275 NULL);
276
277 if (pal) {
278 av_buffer_unref(&context->palette);
279 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
280 if (!context->palette) {
281 av_buffer_unref(&frame->buf[0]);
282 return AVERROR(ENOMEM);
283 }
284 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
285 frame->palette_has_changed = 1;
286 }
287 }
288
289 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
290 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
291 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
292 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
293 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
294 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
295 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
296 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
297 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
298
299 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
300 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
301 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
302 int la0 = FFALIGN(frame->linesize[0], linesize_align);
303 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
304 frame->linesize[0] = la0;
305 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
306 }
307
308 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
309 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
310 frame->buf[1] = av_buffer_ref(context->palette);
311 if (!frame->buf[1]) {
312 av_buffer_unref(&frame->buf[0]);
313 return AVERROR(ENOMEM);
314 }
315 frame->data[1] = frame->buf[1]->data;
316 }
317
318 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
319 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
320 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
321
322 if (context->flip)
323 flip(avctx, picture);
324
325 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
326 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
327 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
328 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
329 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
330
331 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
332 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
333 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
334 }
335
336 if (avctx->codec_tag == AV_RL32("yuv2") &&
337 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
338 int x, y;
339 uint8_t *line = picture->data[0];
340 for (y = 0; y < avctx->height; y++) {
341 for (x = 0; x < avctx->width; x++)
342 line[2 * x + 1] ^= 0x80;
343 line += picture->linesize[0];
344 }
345 }
346
347 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
348 frame->interlaced_frame = 1;
349 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
350 frame->top_field_first = 1;
351 }
352
353 *got_frame = 1;
354 return buf_size;
355}
356
357static av_cold int raw_close_decoder(AVCodecContext *avctx)
358{
359 RawVideoContext *context = avctx->priv_data;
360
361 av_buffer_unref(&context->palette);
362 return 0;
363}
364
365AVCodec ff_rawvideo_decoder = {
366 .name = "rawvideo",
367 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
368 .type = AVMEDIA_TYPE_VIDEO,
369 .id = AV_CODEC_ID_RAWVIDEO,
370 .priv_data_size = sizeof(RawVideoContext),
371 .init = raw_init_decoder,
372 .close = raw_close_decoder,
373 .decode = raw_decode,
374 .priv_class = &rawdec_class,
375 .capabilities = CODEC_CAP_PARAM_CHANGE,
376};
ffmpeg Piment Noir Debian package repository