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
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"
39 typedef struct RawVideoContext {
42 int frame_size; /* size of the frame in bytes */
44 int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
50 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
53 BswapDSPContext bbdsp;
55 unsigned int bitstream_buf_size;
58 static const AVOption options[]={
59 {"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},
63 static const AVClass rawdec_class = {
64 .class_name = "rawdec",
66 .version = LIBAVUTIL_VERSION_INT,
69 static av_cold int raw_init_decoder(AVCodecContext *avctx)
71 RawVideoContext *context = avctx->priv_data;
72 const AVPixFmtDescriptor *desc;
74 ff_bswapdsp_init(&context->bbdsp);
76 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
77 || avctx->codec_tag == MKTAG('N','O','1','6'))
78 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov,
79 avctx->bits_per_coded_sample);
80 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
81 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
82 avctx->bits_per_coded_sample);
83 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
84 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
85 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
86 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
87 avctx->bits_per_coded_sample);
89 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
91 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
92 return AVERROR(EINVAL);
95 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
96 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
97 if (!context->palette)
98 return AVERROR(ENOMEM);
99 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
100 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
102 memset(context->palette->data, 0, AVPALETTE_SIZE);
103 if (avctx->bits_per_coded_sample <= 1)
104 memset(context->palette->data, 0xff, 4);
108 if ((avctx->extradata_size >= 9 &&
109 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
110 avctx->codec_tag == MKTAG('c','y','u','v') ||
111 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
112 avctx->codec_tag == MKTAG('W','R','A','W'))
115 if (avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ||
116 avctx->pix_fmt == AV_PIX_FMT_MONOBLACK)
117 context->is_mono = 1;
118 else if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
119 context->is_pal8 = 1;
121 if (avctx->codec_tag == MKTAG('B','1','W','0') ||
122 avctx->codec_tag == MKTAG('B','0','W','1'))
123 context->is_nut_mono = 1;
124 else if (avctx->codec_tag == MKTAG('P','A','L','8'))
125 context->is_nut_pal8 = 1;
127 if (avctx->codec_tag == AV_RL32("yuv2") &&
128 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
129 context->is_yuv2 = 1;
131 /* Temporary solution until PAL8 is implemented in nut */
132 if (context->is_pal8 && avctx->bits_per_coded_sample == 1)
133 avctx->pix_fmt = AV_PIX_FMT_NONE;
138 static void flip(AVCodecContext *avctx, AVFrame *frame)
140 frame->data[0] += frame->linesize[0] * (avctx->height - 1);
141 frame->linesize[0] *= -1;
145 * Scale sample to 16-bit resolution
147 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
150 * Scale buffer to 16 bits per coded sample resolution
152 #define MKSCALE16(name, r16, w16) \
153 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
157 for (i = 0; i + 1 < buf_size; i += 2) \
158 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
161 init_get_bits(&gb, buf, buf_size * 8); \
162 for (i = 0; i < avctx->width * avctx->height; i++) { \
163 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
164 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
169 MKSCALE16(scale16be, AV_RB16, AV_WB16)
170 MKSCALE16(scale16le, AV_RL16, AV_WL16)
172 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
175 const AVPixFmtDescriptor *desc;
176 RawVideoContext *context = avctx->priv_data;
177 const uint8_t *buf = avpkt->data;
178 int buf_size = avpkt->size;
179 int linesize_align = 4;
184 AVFrame *frame = data;
186 if (avctx->width <= 0) {
187 av_log(avctx, AV_LOG_ERROR, "width is not set\n");
188 return AVERROR_INVALIDDATA;
190 if (avctx->height <= 0) {
191 av_log(avctx, AV_LOG_ERROR, "height is not set\n");
192 return AVERROR_INVALIDDATA;
195 if (context->is_nut_mono)
196 stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
197 else if (context->is_nut_pal8)
198 stride = avctx->width;
200 stride = avpkt->size / avctx->height;
202 if (stride == 0 || avpkt->size < stride * avctx->height) {
203 av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
204 return AVERROR_INVALIDDATA;
207 /* Temporary solution until PAL8 is implemented in nut */
208 if (avctx->pix_fmt == AV_PIX_FMT_NONE &&
209 avctx->bits_per_coded_sample == 1 &&
210 avctx->frame_number == 0 &&
212 AV_RB64(context->palette->data) == 0xFFFFFFFF00000000
214 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
216 avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
217 context->is_pal8 = 0;
218 context->is_mono = 1;
220 avctx->pix_fmt = AV_PIX_FMT_PAL8;
222 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
224 if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4
225 || avctx->bits_per_coded_sample <= 2) &&
226 (context->is_mono || context->is_pal8) &&
227 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ') ||
228 context->is_nut_mono || context->is_nut_pal8)) {
229 context->is_1_2_4_8_bpp = 1;
230 if (context->is_mono) {
231 int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
232 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
233 FFALIGN(row_bytes, 16) * 8,
236 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
237 FFALIGN(avctx->width, 16),
240 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
241 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
244 if (context->frame_size < 0)
245 return context->frame_size;
247 need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
249 frame->pict_type = AV_PICTURE_TYPE_I;
250 frame->key_frame = 1;
252 res = ff_decode_frame_props(avctx, frame);
256 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
257 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
259 if (context->tff >= 0) {
260 frame->interlaced_frame = 1;
261 frame->top_field_first = context->tff;
264 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
268 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
270 frame->buf[0] = av_buffer_ref(avpkt->buf);
272 return AVERROR(ENOMEM);
274 // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
275 if (context->is_1_2_4_8_bpp) {
276 int i, j, row_pix = 0;
277 uint8_t *dst = frame->buf[0]->data;
278 buf_size = context->frame_size - (context->is_pal8 ? AVPALETTE_SIZE : 0);
279 if (avctx->bits_per_coded_sample == 8 || context->is_nut_pal8 || context->is_mono) {
280 int pix_per_byte = context->is_mono ? 8 : 1;
281 for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
283 row_pix += pix_per_byte;
284 if (row_pix >= avctx->width) {
285 i += stride - (i % stride) - 1;
286 j += 16 - (j % 16) - 1;
290 } else if (avctx->bits_per_coded_sample == 4) {
291 for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
292 dst[2 * j + 0] = buf[i] >> 4;
293 dst[2 * j + 1] = buf[i] & 15;
295 if (row_pix >= avctx->width) {
296 i += stride - (i % stride) - 1;
297 j += 8 - (j % 8) - 1;
301 } else if (avctx->bits_per_coded_sample == 2) {
302 for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
303 dst[4 * j + 0] = buf[i] >> 6;
304 dst[4 * j + 1] = buf[i] >> 4 & 3;
305 dst[4 * j + 2] = buf[i] >> 2 & 3;
306 dst[4 * j + 3] = buf[i] & 3;
308 if (row_pix >= avctx->width) {
309 i += stride - (i % stride) - 1;
310 j += 4 - (j % 4) - 1;
315 av_assert0(avctx->bits_per_coded_sample == 1);
316 for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
317 dst[8 * j + 0] = buf[i] >> 7;
318 dst[8 * j + 1] = buf[i] >> 6 & 1;
319 dst[8 * j + 2] = buf[i] >> 5 & 1;
320 dst[8 * j + 3] = buf[i] >> 4 & 1;
321 dst[8 * j + 4] = buf[i] >> 3 & 1;
322 dst[8 * j + 5] = buf[i] >> 2 & 1;
323 dst[8 * j + 6] = buf[i] >> 1 & 1;
324 dst[8 * j + 7] = buf[i] & 1;
326 if (row_pix >= avctx->width) {
327 i += stride - (i % stride) - 1;
328 j += 2 - (j % 2) - 1;
335 } else if (context->is_lt_16bpp) {
336 uint8_t *dst = frame->buf[0]->data;
337 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
338 int swap = avctx->codec_tag >> 24;
340 if (packed && swap) {
341 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
342 if (!context->bitstream_buf)
343 return AVERROR(ENOMEM);
345 context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
347 context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
349 return AVERROR_INVALIDDATA;
350 buf = context->bitstream_buf;
353 if (desc->flags & AV_PIX_FMT_FLAG_BE)
354 scale16be(avctx, dst, buf, buf_size, packed);
356 scale16le(avctx, dst, buf, buf_size, packed);
359 } else if (need_copy) {
360 memcpy(frame->buf[0]->data, buf, buf_size);
361 buf = frame->buf[0]->data;
364 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
365 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
366 buf += buf_size - context->frame_size;
368 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
369 if (buf_size < len && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) {
370 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
371 av_buffer_unref(&frame->buf[0]);
372 return AVERROR(EINVAL);
375 if ((res = av_image_fill_arrays(frame->data, frame->linesize,
377 avctx->width, avctx->height, 1)) < 0) {
378 av_buffer_unref(&frame->buf[0]);
382 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
383 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
387 av_buffer_unref(&context->palette);
388 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
389 if (!context->palette) {
390 av_buffer_unref(&frame->buf[0]);
391 return AVERROR(ENOMEM);
393 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
394 frame->palette_has_changed = 1;
398 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
399 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
400 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
401 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
402 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
403 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
404 avctx->pix_fmt==AV_PIX_FMT_MONOBLACK ||
405 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
406 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
407 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
409 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
410 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
411 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
412 int la0 = FFALIGN(frame->linesize[0], linesize_align);
413 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
414 frame->linesize[0] = la0;
415 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
418 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
419 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
420 frame->buf[1] = av_buffer_ref(context->palette);
421 if (!frame->buf[1]) {
422 av_buffer_unref(&frame->buf[0]);
423 return AVERROR(ENOMEM);
425 frame->data[1] = frame->buf[1]->data;
428 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
429 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
430 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
435 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
436 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
437 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
438 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
439 FFSWAP(uint8_t *, frame->data[1], frame->data[2]);
441 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
442 frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
443 frame->data[2] = frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
446 if (avctx->codec_tag == AV_RL32("yuv2") &&
447 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
449 uint8_t *line = frame->data[0];
450 for (y = 0; y < avctx->height; y++) {
451 for (x = 0; x < avctx->width; x++)
452 line[2 * x + 1] ^= 0x80;
453 line += frame->linesize[0];
457 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
458 frame->interlaced_frame = 1;
459 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
460 frame->top_field_first = 1;
467 static av_cold int raw_close_decoder(AVCodecContext *avctx)
469 RawVideoContext *context = avctx->priv_data;
471 av_buffer_unref(&context->palette);
475 AVCodec ff_rawvideo_decoder = {
477 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
478 .type = AVMEDIA_TYPE_VIDEO,
479 .id = AV_CODEC_ID_RAWVIDEO,
480 .priv_data_size = sizeof(RawVideoContext),
481 .init = raw_init_decoder,
482 .close = raw_close_decoder,
483 .decode = raw_decode,
484 .priv_class = &rawdec_class,
485 .capabilities = AV_CODEC_CAP_PARAM_CHANGE,