FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/rawdec.c
Date: 2024-04-20 14:10:07
Exec Total Coverage
Lines: 161 271 59.4%
Functions: 3 6 50.0%
Branches: 154 288 53.5%

Line Branch Exec Source
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 "codec_internal.h"
30 #include "decode.h"
31 #include "get_bits.h"
32 #include "raw.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/buffer.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/mem.h"
38 #include "libavutil/opt.h"
39
40 typedef struct RawVideoContext {
41 AVClass *av_class;
42 AVBufferRef *palette;
43 int frame_size; /* size of the frame in bytes */
44 int flip;
45 int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
46 int is_mono;
47 int is_pal8;
48 int is_nut_mono;
49 int is_nut_pal8;
50 int is_yuv2;
51 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
52 int tff;
53
54 BswapDSPContext bbdsp;
55 void *bitstream_buf;
56 unsigned int bitstream_buf_size;
57 } RawVideoContext;
58
59 static const AVOption options[]={
60 {"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM},
61 {NULL}
62 };
63
64 static const AVClass rawdec_class = {
65 .class_name = "rawdec",
66 .option = options,
67 .version = LIBAVUTIL_VERSION_INT,
68 };
69
70 1180 static av_cold int raw_init_decoder(AVCodecContext *avctx)
71 {
72 1180 RawVideoContext *context = avctx->priv_data;
73 const AVPixFmtDescriptor *desc;
74
75 1180 ff_bswapdsp_init(&context->bbdsp);
76
77
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1180 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
78
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1180 || avctx->codec_tag == MKTAG('N','O','1','6'))
79 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_MOV,
80 avctx->bits_per_coded_sample);
81
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1180 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
82 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_AVI,
83 avctx->bits_per_coded_sample);
84
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1180 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
85 602 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_RAW, avctx->codec_tag);
86
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578 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
87 15 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_AVI,
88 15 avctx->bits_per_coded_sample);
89
90 1180 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
91
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1180 if (!desc) {
92 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
93 return AVERROR(EINVAL);
94 }
95
96
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1180 if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
97 8 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
98
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8 if (!context->palette)
99 return AVERROR(ENOMEM);
100 8 memset(context->palette->data, 0, AVPALETTE_SIZE);
101
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8 if (avctx->bits_per_coded_sample == 1)
102 8 memset(context->palette->data, 0xff, 4);
103 }
104
105
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1180 if ((avctx->extradata_size >= 9 &&
106
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2 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
107
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1178 avctx->codec_tag == MKTAG('c','y','u','v') ||
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1178 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
109
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1178 avctx->codec_tag == MKTAG('W','R','A','W'))
110 2 context->flip = 1;
111
112
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1180 if (avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ||
113
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1178 avctx->pix_fmt == AV_PIX_FMT_MONOBLACK)
114 4 context->is_mono = 1;
115
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1176 else if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
116 8 context->is_pal8 = 1;
117
118
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1180 if (avctx->codec_tag == MKTAG('B','1','W','0') ||
119
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1179 avctx->codec_tag == MKTAG('B','0','W','1'))
120 2 context->is_nut_mono = 1;
121
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1178 else if (avctx->codec_tag == MKTAG('P','A','L',8))
122 context->is_nut_pal8 = 1;
123
124
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1180 if (avctx->codec_tag == AV_RL32("yuv2") &&
125 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
126 context->is_yuv2 = 1;
127
128 1180 return 0;
129 }
130
131 static void flip(AVCodecContext *avctx, AVFrame *frame)
132 {
133 frame->data[0] += frame->linesize[0] * (avctx->height - 1);
134 frame->linesize[0] *= -1;
135 }
136
137 /*
138 * Scale sample to 16-bit resolution
139 */
140 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
141
142 /**
143 * Scale buffer to 16 bits per coded sample resolution
144 */
145 #define MKSCALE16(name, r16, w16) \
146 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
147 { \
148 int i; \
149 if (!packed) { \
150 for (i = 0; i + 1 < buf_size; i += 2) \
151 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
152 } else { \
153 GetBitContext gb; \
154 init_get_bits(&gb, buf, buf_size * 8); \
155 for (i = 0; i < avctx->width * avctx->height; i++) { \
156 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
157 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
158 } \
159 } \
160 }
161
162 MKSCALE16(scale16be, AV_RB16, AV_WB16)
163 MKSCALE16(scale16le, AV_RL16, AV_WL16)
164
165 23788 static int raw_decode(AVCodecContext *avctx, AVFrame *frame,
166 int *got_frame, AVPacket *avpkt)
167 {
168 const AVPixFmtDescriptor *desc;
169 23788 RawVideoContext *context = avctx->priv_data;
170 23788 const uint8_t *buf = avpkt->data;
171 23788 int buf_size = avpkt->size;
172 23788 int linesize_align = 4;
173 int stride;
174 int res, len;
175 int need_copy;
176
177
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23788 if (avctx->width <= 0) {
178 av_log(avctx, AV_LOG_ERROR, "width is not set\n");
179 return AVERROR_INVALIDDATA;
180 }
181
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23788 if (avctx->height <= 0) {
182 av_log(avctx, AV_LOG_ERROR, "height is not set\n");
183 return AVERROR_INVALIDDATA;
184 }
185
186
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23788 if (context->is_nut_mono)
187 2 stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
188
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23786 else if (context->is_nut_pal8)
189 stride = avctx->width;
190 else
191 23786 stride = avpkt->size / avctx->height;
192
193 23788 av_log(avctx, AV_LOG_DEBUG, "PACKET SIZE: %d, STRIDE: %d\n", avpkt->size, stride);
194
195
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23788 if (stride == 0 || avpkt->size < stride * avctx->height) {
196 1 av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
197 1 return AVERROR_INVALIDDATA;
198 }
199
200 23787 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
201
202
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23787 if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 ||
203
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23787 avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1 ||
204
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23587 (avctx->bits_per_coded_sample == 0 && (context->is_nut_pal8 || context->is_mono)) ) &&
205
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202 (context->is_mono || context->is_pal8) &&
206
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202 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ') ||
207
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2 context->is_nut_mono || context->is_nut_pal8)) {
208 202 context->is_1_2_4_8_bpp = 1;
209
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202 if (context->is_mono) {
210 2 int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
211 2 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
212 2 FFALIGN(row_bytes, 16) * 8,
213 avctx->height, 1);
214 } else
215 200 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
216 200 FFALIGN(avctx->width, 16),
217 avctx->height, 1);
218 } else {
219
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23585 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample > 8 && avctx->bits_per_coded_sample < 16;
220 23585 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
221 avctx->height, 1);
222 }
223
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23787 if (context->frame_size < 0)
224 return context->frame_size;
225
226
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23787 need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
227
228 23787 frame->pict_type = AV_PICTURE_TYPE_I;
229 23787 frame->flags |= AV_FRAME_FLAG_KEY;
230
231 23787 res = ff_decode_frame_props(avctx, frame);
232
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23787 if (res < 0)
233 return res;
234
235
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23787 if (context->tff >= 0) {
236 frame->flags |= AV_FRAME_FLAG_INTERLACED;
237 if (context->tff == 1)
238 frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
239 }
240
241
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23787 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
242 return res;
243
244
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23787 if (need_copy)
245 202 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
246 else
247 23585 frame->buf[0] = av_buffer_ref(avpkt->buf);
248
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23787 if (!frame->buf[0])
249 return AVERROR(ENOMEM);
250
251 // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
252
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23787 if (context->is_1_2_4_8_bpp) {
253 202 int i, j, row_pix = 0;
254 202 uint8_t *dst = frame->buf[0]->data;
255
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202 buf_size = context->frame_size - (context->is_pal8 ? AVPALETTE_SIZE : 0);
256
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204 if (avctx->bits_per_coded_sample == 8 || context->is_nut_pal8 || context->is_mono) {
257
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2 int pix_per_byte = context->is_mono ? 8 : 1;
258
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25346 for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
259 25344 dst[j] = buf[i];
260 25344 row_pix += pix_per_byte;
261
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25344 if (row_pix >= avctx->width) {
262 576 i += stride - (i % stride) - 1;
263 576 j += 16 - (j % 16) - 1;
264 576 row_pix = 0;
265 }
266 }
267
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200 } else if (avctx->bits_per_coded_sample == 4) {
268 for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
269 dst[2 * j + 0] = buf[i] >> 4;
270 dst[2 * j + 1] = buf[i] & 15;
271 row_pix += 2;
272 if (row_pix >= avctx->width) {
273 i += stride - (i % stride) - 1;
274 j += 8 - (j % 8) - 1;
275 row_pix = 0;
276 }
277 }
278
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200 } else if (avctx->bits_per_coded_sample == 2) {
279 for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
280 dst[4 * j + 0] = buf[i] >> 6;
281 dst[4 * j + 1] = buf[i] >> 4 & 3;
282 dst[4 * j + 2] = buf[i] >> 2 & 3;
283 dst[4 * j + 3] = buf[i] & 3;
284 row_pix += 4;
285 if (row_pix >= avctx->width) {
286 i += stride - (i % stride) - 1;
287 j += 4 - (j % 4) - 1;
288 row_pix = 0;
289 }
290 }
291 } else {
292
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200 av_assert0(avctx->bits_per_coded_sample == 1);
293
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1909500 for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
294 1909300 dst[8 * j + 0] = buf[i] >> 7;
295 1909300 dst[8 * j + 1] = buf[i] >> 6 & 1;
296 1909300 dst[8 * j + 2] = buf[i] >> 5 & 1;
297 1909300 dst[8 * j + 3] = buf[i] >> 4 & 1;
298 1909300 dst[8 * j + 4] = buf[i] >> 3 & 1;
299 1909300 dst[8 * j + 5] = buf[i] >> 2 & 1;
300 1909300 dst[8 * j + 6] = buf[i] >> 1 & 1;
301 1909300 dst[8 * j + 7] = buf[i] & 1;
302 1909300 row_pix += 8;
303
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1909300 if (row_pix >= avctx->width) {
304 44900 i += stride - (i % stride) - 1;
305 44900 j += 2 - (j % 2) - 1;
306 44900 row_pix = 0;
307 }
308 }
309 }
310 202 linesize_align = 16;
311 202 buf = dst;
312
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23585 } else if (context->is_lt_16bpp) {
313 uint8_t *dst = frame->buf[0]->data;
314 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
315 int swap = avctx->codec_tag >> 24;
316
317 if (packed && swap) {
318 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
319 if (!context->bitstream_buf)
320 return AVERROR(ENOMEM);
321 if (swap == 16)
322 context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
323 else if (swap == 32)
324 context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
325 else
326 return AVERROR_INVALIDDATA;
327 buf = context->bitstream_buf;
328 }
329
330 if (desc->flags & AV_PIX_FMT_FLAG_BE)
331 scale16be(avctx, dst, buf, buf_size, packed);
332 else
333 scale16le(avctx, dst, buf, buf_size, packed);
334
335 buf = dst;
336
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23585 } else if (need_copy) {
337 memcpy(frame->buf[0]->data, buf, buf_size);
338 buf = frame->buf[0]->data;
339 }
340
341
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23787 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
342
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23787 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
343 buf += buf_size - context->frame_size;
344
345
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23787 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
346
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23787 if (buf_size < len && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) {
347 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
348 av_buffer_unref(&frame->buf[0]);
349 return AVERROR(EINVAL);
350 }
351
352
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23787 if ((res = av_image_fill_arrays(frame->data, frame->linesize,
353 buf, avctx->pix_fmt,
354 avctx->width, avctx->height, 1)) < 0) {
355 av_buffer_unref(&frame->buf[0]);
356 return res;
357 }
358
359
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23787 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
360 int ret;
361
362
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200 if (!context->palette)
363 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
364
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200 if (!context->palette) {
365 av_buffer_unref(&frame->buf[0]);
366 return AVERROR(ENOMEM);
367 }
368 200 ret = av_buffer_make_writable(&context->palette);
369
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200 if (ret < 0) {
370 av_buffer_unref(&frame->buf[0]);
371 return ret;
372 }
373
374
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200 if (ff_copy_palette(context->palette->data, avpkt, avctx)) {
375 #if FF_API_PALETTE_HAS_CHANGED
376 FF_DISABLE_DEPRECATION_WARNINGS
377 4 frame->palette_has_changed = 1;
378 FF_ENABLE_DEPRECATION_WARNINGS
379 #endif
380
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196 } else if (context->is_nut_pal8) {
381 int vid_size = avctx->width * avctx->height;
382 int pal_size = avpkt->size - vid_size;
383
384 if (avpkt->size > vid_size && pal_size <= AVPALETTE_SIZE) {
385 const uint8_t *pal = avpkt->data + vid_size;
386 memcpy(context->palette->data, pal, pal_size);
387 #if FF_API_PALETTE_HAS_CHANGED
388 FF_DISABLE_DEPRECATION_WARNINGS
389 frame->palette_has_changed = 1;
390 FF_ENABLE_DEPRECATION_WARNINGS
391 #endif
392 }
393 }
394 }
395
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23787 if ((avctx->pix_fmt==AV_PIX_FMT_RGB24 ||
397
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23722 avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
398
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23320 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
399
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23319 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
400
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22918 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
401
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22918 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
402
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22717 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
403
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22716 avctx->pix_fmt==AV_PIX_FMT_MONOBLACK ||
404
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22715 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
405
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1272 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
406 1222 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
407
408
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23787 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
409 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
410 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
411 int la0 = FFALIGN(frame->linesize[0], linesize_align);
412 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
413 frame->linesize[0] = la0;
414 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
415 }
416
417
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23787 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) {
418 200 frame->buf[1] = av_buffer_ref(context->palette);
419
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200 if (!frame->buf[1]) {
420 av_buffer_unref(&frame->buf[0]);
421 return AVERROR(ENOMEM);
422 }
423 200 frame->data[1] = frame->buf[1]->data;
424 }
425
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23787 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
427
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402 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
428 352 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
429
430
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23787 if (context->flip)
431 flip(avctx, frame);
432
433
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23787 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
434
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23787 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
435
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23787 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
436
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23787 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
437 FFSWAP(uint8_t *, frame->data[1], frame->data[2]);
438
439
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23787 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
440 frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
441 frame->data[2] = frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
442 }
443
444
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23787 if (avctx->codec_tag == AV_RL32("yuv2") &&
445 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
446 int x, y;
447 uint8_t *line = frame->data[0];
448 for (y = 0; y < avctx->height; y++) {
449 for (x = 0; x < avctx->width; x++)
450 line[2 * x + 1] ^= 0x80;
451 line += frame->linesize[0];
452 }
453 }
454
455
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23787 if (avctx->codec_tag == AV_RL32("b64a") &&
456 avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
457 uint8_t *dst = frame->data[0];
458 uint64_t v;
459 int x, y;
460 for (y = 0; y < avctx->height; y++) {
461 for (x = 0; x >> 3 < avctx->width; x += 8) {
462 v = AV_RB64(&dst[x]);
463 AV_WB64(&dst[x], v << 16 | v >> 48);
464 }
465 dst += frame->linesize[0];
466 }
467 }
468
469
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23787 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
470 frame->flags |= AV_FRAME_FLAG_INTERLACED;
471 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
472 frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
473 }
474
475 23787 *got_frame = 1;
476 23787 return buf_size;
477 }
478
479 1180 static av_cold int raw_close_decoder(AVCodecContext *avctx)
480 {
481 1180 RawVideoContext *context = avctx->priv_data;
482
483 1180 av_buffer_unref(&context->palette);
484 1180 av_freep(&context->bitstream_buf);
485 1180 return 0;
486 }
487
488 const FFCodec ff_rawvideo_decoder = {
489 .p.name = "rawvideo",
490 CODEC_LONG_NAME("raw video"),
491 .p.type = AVMEDIA_TYPE_VIDEO,
492 .p.id = AV_CODEC_ID_RAWVIDEO,
493 .priv_data_size = sizeof(RawVideoContext),
494 .init = raw_init_decoder,
495 .close = raw_close_decoder,
496 FF_CODEC_DECODE_CB(raw_decode),
497 .p.priv_class = &rawdec_class,
498 .p.capabilities = AV_CODEC_CAP_PARAM_CHANGE,
499 };
500