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
46 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
49 BswapDSPContext bbdsp;
51 unsigned int bitstream_buf_size;
54 static const AVOption options[]={
55 {"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},
59 static const AVClass rawdec_class = {
60 .class_name = "rawdec",
62 .version = LIBAVUTIL_VERSION_INT,
65 static av_cold int raw_init_decoder(AVCodecContext *avctx)
67 RawVideoContext *context = avctx->priv_data;
68 const AVPixFmtDescriptor *desc;
70 ff_bswapdsp_init(&context->bbdsp);
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);
85 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
87 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
88 return AVERROR(EINVAL);
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);
98 memset(context->palette->data, 0, AVPALETTE_SIZE);
99 if (avctx->bits_per_coded_sample == 1)
100 memset(context->palette->data, 0xff, 4);
104 if ((avctx->extradata_size >= 9 &&
105 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
106 avctx->codec_tag == MKTAG('c','y','u','v') ||
107 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
108 avctx->codec_tag == MKTAG('W','R','A','W'))
111 if (avctx->codec_tag == AV_RL32("yuv2") &&
112 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
113 context->is_yuv2 = 1;
118 static void flip(AVCodecContext *avctx, AVFrame *frame)
120 frame->data[0] += frame->linesize[0] * (avctx->height - 1);
121 frame->linesize[0] *= -1;
125 * Scale sample to 16-bit resolution
127 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
130 * Scale buffer to 16 bits per coded sample resolution
132 #define MKSCALE16(name, r16, w16) \
133 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
137 for (i = 0; i + 1 < buf_size; i += 2) \
138 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
141 init_get_bits(&gb, buf, buf_size * 8); \
142 for (i = 0; i < avctx->width * avctx->height; i++) { \
143 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
144 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
149 MKSCALE16(scale16be, AV_RB16, AV_WB16)
150 MKSCALE16(scale16le, AV_RL16, AV_WL16)
152 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
155 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
156 RawVideoContext *context = avctx->priv_data;
157 const uint8_t *buf = avpkt->data;
158 int buf_size = avpkt->size;
159 int linesize_align = 4;
164 AVFrame *frame = data;
166 if (avctx->height <= 0) {
167 av_log(avctx, AV_LOG_ERROR, "height is not set\n");
168 return AVERROR_INVALIDDATA;
170 avpkt_stride = avpkt->size / avctx->height;
172 if (avpkt_stride == 0) {
173 av_log(avctx, AV_LOG_ERROR, "Packet too small (%d) height (%d)\n", avpkt->size, avctx->height);
174 return AVERROR_INVALIDDATA;
177 if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4
178 || avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1) &&
179 (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_MONOWHITE) &&
180 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
181 context->is_1_2_4_8_bpp = 1;
182 if (avctx->bits_per_coded_sample == 1 && avctx->pix_fmt == AV_PIX_FMT_MONOWHITE) {
183 int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
184 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
185 FFALIGN(row_bytes, 16) * 8,
188 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
189 FFALIGN(avctx->width, 16),
192 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
193 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
196 if (context->frame_size < 0)
197 return context->frame_size;
199 need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
201 frame->pict_type = AV_PICTURE_TYPE_I;
202 frame->key_frame = 1;
204 res = ff_decode_frame_props(avctx, frame);
208 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
209 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
211 if (context->tff >= 0) {
212 frame->interlaced_frame = 1;
213 frame->top_field_first = context->tff;
216 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
220 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
222 frame->buf[0] = av_buffer_ref(avpkt->buf);
224 return AVERROR(ENOMEM);
226 // 1, 2, 4 and 8 bpp in avi/mov
227 if (context->is_1_2_4_8_bpp) {
228 int i, j, row_pix = 0;
229 uint8_t *dst = frame->buf[0]->data;
230 buf_size = context->frame_size -
231 (avctx->pix_fmt == AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
232 if (avctx->bits_per_coded_sample == 8 || avctx->pix_fmt == AV_PIX_FMT_MONOWHITE) {
233 int pix_per_byte = avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ? 8 : 1;
234 for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
236 row_pix += pix_per_byte;
237 if (row_pix >= avctx->width) {
238 i += avpkt_stride - (i % avpkt_stride) - 1;
239 j += 16 - (j % 16) - 1;
243 } else if (avctx->bits_per_coded_sample == 4) {
244 for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
245 dst[2 * j + 0] = buf[i] >> 4;
246 dst[2 * j + 1] = buf[i] & 15;
248 if (row_pix >= avctx->width) {
249 i += avpkt_stride - (i % avpkt_stride) - 1;
250 j += 8 - (j % 8) - 1;
254 } else if (avctx->bits_per_coded_sample == 2) {
255 for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
256 dst[4 * j + 0] = buf[i] >> 6;
257 dst[4 * j + 1] = buf[i] >> 4 & 3;
258 dst[4 * j + 2] = buf[i] >> 2 & 3;
259 dst[4 * j + 3] = buf[i] & 3;
261 if (row_pix >= avctx->width) {
262 i += avpkt_stride - (i % avpkt_stride) - 1;
263 j += 4 - (j % 4) - 1;
268 av_assert0(avctx->bits_per_coded_sample == 1);
269 for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
270 dst[8 * j + 0] = buf[i] >> 7;
271 dst[8 * j + 1] = buf[i] >> 6 & 1;
272 dst[8 * j + 2] = buf[i] >> 5 & 1;
273 dst[8 * j + 3] = buf[i] >> 4 & 1;
274 dst[8 * j + 4] = buf[i] >> 3 & 1;
275 dst[8 * j + 5] = buf[i] >> 2 & 1;
276 dst[8 * j + 6] = buf[i] >> 1 & 1;
277 dst[8 * j + 7] = buf[i] & 1;
279 if (row_pix >= avctx->width) {
280 i += avpkt_stride - (i % avpkt_stride) - 1;
281 j += 2 - (j % 2) - 1;
288 } else if (context->is_lt_16bpp) {
289 uint8_t *dst = frame->buf[0]->data;
290 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
291 int swap = avctx->codec_tag >> 24;
293 if (packed && swap) {
294 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
295 if (!context->bitstream_buf)
296 return AVERROR(ENOMEM);
298 context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
300 context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
302 return AVERROR_INVALIDDATA;
303 buf = context->bitstream_buf;
306 if (desc->flags & AV_PIX_FMT_FLAG_BE)
307 scale16be(avctx, dst, buf, buf_size, packed);
309 scale16le(avctx, dst, buf, buf_size, packed);
312 } else if (need_copy) {
313 memcpy(frame->buf[0]->data, buf, buf_size);
314 buf = frame->buf[0]->data;
317 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
318 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
319 buf += buf_size - context->frame_size;
321 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
322 if (buf_size < len && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) {
323 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
324 av_buffer_unref(&frame->buf[0]);
325 return AVERROR(EINVAL);
328 if ((res = av_image_fill_arrays(frame->data, frame->linesize,
330 avctx->width, avctx->height, 1)) < 0) {
331 av_buffer_unref(&frame->buf[0]);
335 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
336 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
340 av_buffer_unref(&context->palette);
341 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
342 if (!context->palette) {
343 av_buffer_unref(&frame->buf[0]);
344 return AVERROR(ENOMEM);
346 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
347 frame->palette_has_changed = 1;
351 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
352 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
353 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
354 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
355 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
356 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
357 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
358 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
359 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
361 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
362 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
363 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
364 int la0 = FFALIGN(frame->linesize[0], linesize_align);
365 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
366 frame->linesize[0] = la0;
367 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
370 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
371 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
372 frame->buf[1] = av_buffer_ref(context->palette);
373 if (!frame->buf[1]) {
374 av_buffer_unref(&frame->buf[0]);
375 return AVERROR(ENOMEM);
377 frame->data[1] = frame->buf[1]->data;
380 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
381 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
382 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
387 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
388 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
389 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
390 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
391 FFSWAP(uint8_t *, frame->data[1], frame->data[2]);
393 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
394 frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
395 frame->data[2] = frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
398 if (avctx->codec_tag == AV_RL32("yuv2") &&
399 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
401 uint8_t *line = frame->data[0];
402 for (y = 0; y < avctx->height; y++) {
403 for (x = 0; x < avctx->width; x++)
404 line[2 * x + 1] ^= 0x80;
405 line += frame->linesize[0];
409 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
410 frame->interlaced_frame = 1;
411 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
412 frame->top_field_first = 1;
419 static av_cold int raw_close_decoder(AVCodecContext *avctx)
421 RawVideoContext *context = avctx->priv_data;
423 av_buffer_unref(&context->palette);
427 AVCodec ff_rawvideo_decoder = {
429 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
430 .type = AVMEDIA_TYPE_VIDEO,
431 .id = AV_CODEC_ID_RAWVIDEO,
432 .priv_data_size = sizeof(RawVideoContext),
433 .init = raw_init_decoder,
434 .close = raw_close_decoder,
435 .decode = raw_decode,
436 .priv_class = &rawdec_class,
437 .capabilities = AV_CODEC_CAP_PARAM_CHANGE,