FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/rawdec.c
Date: 2022-07-07 01:21:54
Exec Total Coverage
Lines: 163 271 60.1%
Branches: 154 286 53.8%

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 "internal.h"
33 #include "raw.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/buffer.h"
36 #include "libavutil/common.h"
37 #include "libavutil/intreadwrite.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/opt.h"
40
41 typedef struct RawVideoContext {
42 AVClass *av_class;
43 AVBufferRef *palette;
44 int frame_size; /* size of the frame in bytes */
45 int flip;
46 int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
47 int is_mono;
48 int is_pal8;
49 int is_nut_mono;
50 int is_nut_pal8;
51 int is_yuv2;
52 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
53 int tff;
54
55 BswapDSPContext bbdsp;
56 void *bitstream_buf;
57 unsigned int bitstream_buf_size;
58 } RawVideoContext;
59
60 static const AVOption options[]={
61 {"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},
62 {NULL}
63 };
64
65 static const AVClass rawdec_class = {
66 .class_name = "rawdec",
67 .option = options,
68 .version = LIBAVUTIL_VERSION_INT,
69 };
70
71 1143 static av_cold int raw_init_decoder(AVCodecContext *avctx)
72 {
73 1143 RawVideoContext *context = avctx->priv_data;
74 const AVPixFmtDescriptor *desc;
75
76 1143 ff_bswapdsp_init(&context->bbdsp);
77
78
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1143 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
79
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1143 || avctx->codec_tag == MKTAG('N','O','1','6'))
80 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_MOV,
81 avctx->bits_per_coded_sample);
82
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1143 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
83 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_AVI,
84 avctx->bits_per_coded_sample);
85
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1143 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
86 580 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_RAW, avctx->codec_tag);
87
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563 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
88 14 avctx->pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_AVI,
89 14 avctx->bits_per_coded_sample);
90
91 1143 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
92
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1143 if (!desc) {
93 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
94 return AVERROR(EINVAL);
95 }
96
97
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1143 if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
98 8 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
99
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8 if (!context->palette)
100 return AVERROR(ENOMEM);
101 8 memset(context->palette->data, 0, AVPALETTE_SIZE);
102
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8 if (avctx->bits_per_coded_sample == 1)
103 8 memset(context->palette->data, 0xff, 4);
104 }
105
106
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1143 if ((avctx->extradata_size >= 9 &&
107
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2 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
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1141 avctx->codec_tag == MKTAG('c','y','u','v') ||
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1141 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
110
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1141 avctx->codec_tag == MKTAG('W','R','A','W'))
111 2 context->flip = 1;
112
113
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1143 if (avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ||
114
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1141 avctx->pix_fmt == AV_PIX_FMT_MONOBLACK)
115 4 context->is_mono = 1;
116
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1139 else if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
117 8 context->is_pal8 = 1;
118
119
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1143 if (avctx->codec_tag == MKTAG('B','1','W','0') ||
120
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1142 avctx->codec_tag == MKTAG('B','0','W','1'))
121 2 context->is_nut_mono = 1;
122
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1141 else if (avctx->codec_tag == MKTAG('P','A','L',8))
123 context->is_nut_pal8 = 1;
124
125
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1143 if (avctx->codec_tag == AV_RL32("yuv2") &&
126 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
127 context->is_yuv2 = 1;
128
129 1143 return 0;
130 }
131
132 static void flip(AVCodecContext *avctx, AVFrame *frame)
133 {
134 frame->data[0] += frame->linesize[0] * (avctx->height - 1);
135 frame->linesize[0] *= -1;
136 }
137
138 /*
139 * Scale sample to 16-bit resolution
140 */
141 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
142
143 /**
144 * Scale buffer to 16 bits per coded sample resolution
145 */
146 #define MKSCALE16(name, r16, w16) \
147 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
148 { \
149 int i; \
150 if (!packed) { \
151 for (i = 0; i + 1 < buf_size; i += 2) \
152 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
153 } else { \
154 GetBitContext gb; \
155 init_get_bits(&gb, buf, buf_size * 8); \
156 for (i = 0; i < avctx->width * avctx->height; i++) { \
157 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
158 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
159 } \
160 } \
161 }
162
163 MKSCALE16(scale16be, AV_RB16, AV_WB16)
164 MKSCALE16(scale16le, AV_RL16, AV_WL16)
165
166 21899 static int raw_decode(AVCodecContext *avctx, AVFrame *frame,
167 int *got_frame, AVPacket *avpkt)
168 {
169 const AVPixFmtDescriptor *desc;
170 21899 RawVideoContext *context = avctx->priv_data;
171 21899 const uint8_t *buf = avpkt->data;
172 21899 int buf_size = avpkt->size;
173 21899 int linesize_align = 4;
174 int stride;
175 int res, len;
176 int need_copy;
177
178
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21899 if (avctx->width <= 0) {
179 av_log(avctx, AV_LOG_ERROR, "width is not set\n");
180 return AVERROR_INVALIDDATA;
181 }
182
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21899 if (avctx->height <= 0) {
183 av_log(avctx, AV_LOG_ERROR, "height is not set\n");
184 return AVERROR_INVALIDDATA;
185 }
186
187
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21899 if (context->is_nut_mono)
188 2 stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
189
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21897 else if (context->is_nut_pal8)
190 stride = avctx->width;
191 else
192 21897 stride = avpkt->size / avctx->height;
193
194 21899 av_log(avctx, AV_LOG_DEBUG, "PACKET SIZE: %d, STRIDE: %d\n", avpkt->size, stride);
195
196
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21899 if (stride == 0 || avpkt->size < stride * avctx->height) {
197 1 av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
198 1 return AVERROR_INVALIDDATA;
199 }
200
201 21898 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
202
203
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21898 if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 ||
204
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21898 avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1 ||
205
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21698 (avctx->bits_per_coded_sample == 0 && (context->is_nut_pal8 || context->is_mono)) ) &&
206
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202 (context->is_mono || context->is_pal8) &&
207
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202 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ') ||
208
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2 context->is_nut_mono || context->is_nut_pal8)) {
209 202 context->is_1_2_4_8_bpp = 1;
210
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202 if (context->is_mono) {
211 2 int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
212 2 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
213 2 FFALIGN(row_bytes, 16) * 8,
214 avctx->height, 1);
215 } else
216 200 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
217 200 FFALIGN(avctx->width, 16),
218 avctx->height, 1);
219 } else {
220
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21696 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample > 8 && avctx->bits_per_coded_sample < 16;
221 21696 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
222 avctx->height, 1);
223 }
224
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21898 if (context->frame_size < 0)
225 return context->frame_size;
226
227
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21898 need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
228
229 21898 frame->pict_type = AV_PICTURE_TYPE_I;
230 21898 frame->key_frame = 1;
231
232 21898 res = ff_decode_frame_props(avctx, frame);
233
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21898 if (res < 0)
234 return res;
235
236 21898 frame->pkt_pos = avctx->internal->last_pkt_props->pos;
237 21898 frame->pkt_duration = avctx->internal->last_pkt_props->duration;
238
239
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21898 if (context->tff >= 0) {
240 frame->interlaced_frame = 1;
241 frame->top_field_first = context->tff;
242 }
243
244
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21898 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
245 return res;
246
247
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21898 if (need_copy)
248 202 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
249 else
250 21696 frame->buf[0] = av_buffer_ref(avpkt->buf);
251
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21898 if (!frame->buf[0])
252 return AVERROR(ENOMEM);
253
254 // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
255
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21898 if (context->is_1_2_4_8_bpp) {
256 202 int i, j, row_pix = 0;
257 202 uint8_t *dst = frame->buf[0]->data;
258
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202 buf_size = context->frame_size - (context->is_pal8 ? AVPALETTE_SIZE : 0);
259
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204 if (avctx->bits_per_coded_sample == 8 || context->is_nut_pal8 || context->is_mono) {
260
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2 int pix_per_byte = context->is_mono ? 8 : 1;
261
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25346 for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
262 25344 dst[j] = buf[i];
263 25344 row_pix += pix_per_byte;
264
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25344 if (row_pix >= avctx->width) {
265 576 i += stride - (i % stride) - 1;
266 576 j += 16 - (j % 16) - 1;
267 576 row_pix = 0;
268 }
269 }
270
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200 } else if (avctx->bits_per_coded_sample == 4) {
271 for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
272 dst[2 * j + 0] = buf[i] >> 4;
273 dst[2 * j + 1] = buf[i] & 15;
274 row_pix += 2;
275 if (row_pix >= avctx->width) {
276 i += stride - (i % stride) - 1;
277 j += 8 - (j % 8) - 1;
278 row_pix = 0;
279 }
280 }
281
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200 } else if (avctx->bits_per_coded_sample == 2) {
282 for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
283 dst[4 * j + 0] = buf[i] >> 6;
284 dst[4 * j + 1] = buf[i] >> 4 & 3;
285 dst[4 * j + 2] = buf[i] >> 2 & 3;
286 dst[4 * j + 3] = buf[i] & 3;
287 row_pix += 4;
288 if (row_pix >= avctx->width) {
289 i += stride - (i % stride) - 1;
290 j += 4 - (j % 4) - 1;
291 row_pix = 0;
292 }
293 }
294 } else {
295
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200 av_assert0(avctx->bits_per_coded_sample == 1);
296
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1909500 for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
297 1909300 dst[8 * j + 0] = buf[i] >> 7;
298 1909300 dst[8 * j + 1] = buf[i] >> 6 & 1;
299 1909300 dst[8 * j + 2] = buf[i] >> 5 & 1;
300 1909300 dst[8 * j + 3] = buf[i] >> 4 & 1;
301 1909300 dst[8 * j + 4] = buf[i] >> 3 & 1;
302 1909300 dst[8 * j + 5] = buf[i] >> 2 & 1;
303 1909300 dst[8 * j + 6] = buf[i] >> 1 & 1;
304 1909300 dst[8 * j + 7] = buf[i] & 1;
305 1909300 row_pix += 8;
306
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1909300 if (row_pix >= avctx->width) {
307 44900 i += stride - (i % stride) - 1;
308 44900 j += 2 - (j % 2) - 1;
309 44900 row_pix = 0;
310 }
311 }
312 }
313 202 linesize_align = 16;
314 202 buf = dst;
315
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21696 } else if (context->is_lt_16bpp) {
316 uint8_t *dst = frame->buf[0]->data;
317 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
318 int swap = avctx->codec_tag >> 24;
319
320 if (packed && swap) {
321 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
322 if (!context->bitstream_buf)
323 return AVERROR(ENOMEM);
324 if (swap == 16)
325 context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
326 else if (swap == 32)
327 context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
328 else
329 return AVERROR_INVALIDDATA;
330 buf = context->bitstream_buf;
331 }
332
333 if (desc->flags & AV_PIX_FMT_FLAG_BE)
334 scale16be(avctx, dst, buf, buf_size, packed);
335 else
336 scale16le(avctx, dst, buf, buf_size, packed);
337
338 buf = dst;
339
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21696 } else if (need_copy) {
340 memcpy(frame->buf[0]->data, buf, buf_size);
341 buf = frame->buf[0]->data;
342 }
343
344
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21898 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
345
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21898 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
346 buf += buf_size - context->frame_size;
347
348
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21898 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
349
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21898 if (buf_size < len && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) {
350 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
351 av_buffer_unref(&frame->buf[0]);
352 return AVERROR(EINVAL);
353 }
354
355
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21898 if ((res = av_image_fill_arrays(frame->data, frame->linesize,
356 buf, avctx->pix_fmt,
357 avctx->width, avctx->height, 1)) < 0) {
358 av_buffer_unref(&frame->buf[0]);
359 return res;
360 }
361
362
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21898 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
363 int ret;
364
365
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200 if (!context->palette)
366 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
367
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200 if (!context->palette) {
368 av_buffer_unref(&frame->buf[0]);
369 return AVERROR(ENOMEM);
370 }
371 200 ret = av_buffer_make_writable(&context->palette);
372
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200 if (ret < 0) {
373 av_buffer_unref(&frame->buf[0]);
374 return ret;
375 }
376
377
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200 if (ff_copy_palette(context->palette->data, avpkt, avctx)) {
378 4 frame->palette_has_changed = 1;
379
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196 } else if (context->is_nut_pal8) {
380 int vid_size = avctx->width * avctx->height;
381 int pal_size = avpkt->size - vid_size;
382
383 if (avpkt->size > vid_size && pal_size <= AVPALETTE_SIZE) {
384 const uint8_t *pal = avpkt->data + vid_size;
385 memcpy(context->palette->data, pal, pal_size);
386 frame->palette_has_changed = 1;
387 }
388 }
389 }
390
391
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21898 if ((avctx->pix_fmt==AV_PIX_FMT_RGB24 ||
392
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21604 avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
393
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21202 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
394
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21201 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
395
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20800 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
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20800 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
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20599 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
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20598 avctx->pix_fmt==AV_PIX_FMT_MONOBLACK ||
399
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20597 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
400
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1501 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
401 1451 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
402
403
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21898 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
404 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
405 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
406 int la0 = FFALIGN(frame->linesize[0], linesize_align);
407 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
408 frame->linesize[0] = la0;
409 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
410 }
411
412
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21898 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) {
413 200 frame->buf[1] = av_buffer_ref(context->palette);
414
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200 if (!frame->buf[1]) {
415 av_buffer_unref(&frame->buf[0]);
416 return AVERROR(ENOMEM);
417 }
418 200 frame->data[1] = frame->buf[1]->data;
419 }
420
421
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21898 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
422
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402 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
423 352 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
424
425
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21898 if (context->flip)
426 flip(avctx, frame);
427
428
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21898 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
429
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21898 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
430
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21898 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
431
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21898 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
432 FFSWAP(uint8_t *, frame->data[1], frame->data[2]);
433
434
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21898 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
435 frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
436 frame->data[2] = frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
437 }
438
439
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21898 if (avctx->codec_tag == AV_RL32("yuv2") &&
440 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
441 int x, y;
442 uint8_t *line = frame->data[0];
443 for (y = 0; y < avctx->height; y++) {
444 for (x = 0; x < avctx->width; x++)
445 line[2 * x + 1] ^= 0x80;
446 line += frame->linesize[0];
447 }
448 }
449
450
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21898 if (avctx->codec_tag == AV_RL32("b64a") &&
451 avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
452 uint8_t *dst = frame->data[0];
453 uint64_t v;
454 int x, y;
455 for (y = 0; y < avctx->height; y++) {
456 for (x = 0; x >> 3 < avctx->width; x += 8) {
457 v = AV_RB64(&dst[x]);
458 AV_WB64(&dst[x], v << 16 | v >> 48);
459 }
460 dst += frame->linesize[0];
461 }
462 }
463
464
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21898 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
465 frame->interlaced_frame = 1;
466 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
467 frame->top_field_first = 1;
468 }
469
470 21898 *got_frame = 1;
471 21898 return buf_size;
472 }
473
474 1143 static av_cold int raw_close_decoder(AVCodecContext *avctx)
475 {
476 1143 RawVideoContext *context = avctx->priv_data;
477
478 1143 av_buffer_unref(&context->palette);
479 1143 av_freep(&context->bitstream_buf);
480 1143 return 0;
481 }
482
483 const FFCodec ff_rawvideo_decoder = {
484 .p.name = "rawvideo",
485 .p.long_name = NULL_IF_CONFIG_SMALL("raw video"),
486 .p.type = AVMEDIA_TYPE_VIDEO,
487 .p.id = AV_CODEC_ID_RAWVIDEO,
488 .priv_data_size = sizeof(RawVideoContext),
489 .init = raw_init_decoder,
490 .close = raw_close_decoder,
491 FF_CODEC_DECODE_CB(raw_decode),
492 .p.priv_class = &rawdec_class,
493 .p.capabilities = AV_CODEC_CAP_PARAM_CHANGE,
494 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
495 };
496