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_2_4_bpp; // 2 or 4 bpp raw in avi/mov
46 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
51 unsigned int bitstream_buf_size;
54 static 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},
59 static const AVClass rawdec_class = {
60 .class_name = "rawdec",
62 .version = LIBAVUTIL_VERSION_INT,
65 static const PixelFormatTag pix_fmt_bps_avi[] = {
66 { AV_PIX_FMT_MONOWHITE, 1 },
67 { AV_PIX_FMT_PAL8, 2 },
68 { AV_PIX_FMT_PAL8, 4 },
69 { AV_PIX_FMT_PAL8, 8 },
70 { AV_PIX_FMT_RGB444LE, 12 },
71 { AV_PIX_FMT_RGB555LE, 15 },
72 { AV_PIX_FMT_RGB555LE, 16 },
73 { AV_PIX_FMT_BGR24, 24 },
74 { AV_PIX_FMT_BGRA, 32 },
75 { AV_PIX_FMT_NONE, 0 },
78 static const PixelFormatTag pix_fmt_bps_mov[] = {
79 { AV_PIX_FMT_MONOWHITE, 1 },
80 { AV_PIX_FMT_PAL8, 2 },
81 { AV_PIX_FMT_PAL8, 4 },
82 { AV_PIX_FMT_PAL8, 8 },
83 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
84 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
85 { AV_PIX_FMT_RGB555BE, 16 },
86 { AV_PIX_FMT_RGB24, 24 },
87 { AV_PIX_FMT_ARGB, 32 },
88 { AV_PIX_FMT_MONOWHITE,33 },
89 { AV_PIX_FMT_NONE, 0 },
92 enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
95 while (tags->pix_fmt >= 0) {
96 if (tags->fourcc == fourcc)
100 return AV_PIX_FMT_NONE;
103 #if LIBAVCODEC_VERSION_MAJOR < 55
104 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
106 return avpriv_find_pix_fmt(tags, fourcc);
110 static av_cold int raw_init_decoder(AVCodecContext *avctx)
112 RawVideoContext *context = avctx->priv_data;
113 const AVPixFmtDescriptor *desc;
115 ff_dsputil_init(&context->dsp, avctx);
117 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
118 || avctx->codec_tag == MKTAG('N','O','1','6'))
119 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
120 avctx->bits_per_coded_sample);
121 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
122 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
123 avctx->bits_per_coded_sample);
124 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
125 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
126 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
127 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
128 avctx->bits_per_coded_sample);
130 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
132 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
133 return AVERROR(EINVAL);
136 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
137 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
138 if (!context->palette)
139 return AVERROR(ENOMEM);
140 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
141 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
143 memset(context->palette->data, 0, AVPALETTE_SIZE);
146 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
147 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
148 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
149 context->is_2_4_bpp = 1;
150 context->frame_size = avpicture_get_size(avctx->pix_fmt,
151 FFALIGN(avctx->width, 16),
154 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
155 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
159 if ((avctx->extradata_size >= 9 &&
160 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
161 avctx->codec_tag == MKTAG('c','y','u','v') ||
162 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
163 avctx->codec_tag == MKTAG('W','R','A','W'))
166 if (avctx->codec_tag == AV_RL32("yuv2") &&
167 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
168 context->is_yuv2 = 1;
173 static void flip(AVCodecContext *avctx, AVPicture *picture)
175 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
176 picture->linesize[0] *= -1;
180 * Scale sample to 16-bit resolution
182 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
185 * Scale buffer to 16 bits per coded sample resolution
187 #define MKSCALE16(name, r16, w16) \
188 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
192 for (i = 0; i + 1 < buf_size; i += 2) \
193 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
196 init_get_bits(&gb, buf, buf_size * 8); \
197 for (i = 0; i < avctx->width * avctx->height; i++) { \
198 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
199 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
204 MKSCALE16(scale16be, AV_RB16, AV_WB16)
205 MKSCALE16(scale16le, AV_RL16, AV_WL16)
207 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
210 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
211 RawVideoContext *context = avctx->priv_data;
212 const uint8_t *buf = avpkt->data;
213 int buf_size = avpkt->size;
214 int linesize_align = 4;
216 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
218 AVFrame *frame = data;
219 AVPicture *picture = data;
221 frame->pict_type = AV_PICTURE_TYPE_I;
222 frame->key_frame = 1;
223 frame->reordered_opaque = avctx->reordered_opaque;
224 frame->pkt_pts = avctx->internal->pkt->pts;
225 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
226 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
228 if (context->tff >= 0) {
229 frame->interlaced_frame = 1;
230 frame->top_field_first = context->tff;
233 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
237 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
239 frame->buf[0] = av_buffer_ref(avpkt->buf);
241 return AVERROR(ENOMEM);
243 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
244 if (context->is_2_4_bpp) {
246 uint8_t *dst = frame->buf[0]->data;
247 buf_size = context->frame_size - AVPALETTE_SIZE;
248 if (avctx->bits_per_coded_sample == 4) {
249 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
250 dst[2 * i + 0] = buf[i] >> 4;
251 dst[2 * i + 1] = buf[i] & 15;
255 av_assert0(avctx->bits_per_coded_sample == 2);
256 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
257 dst[4 * i + 0] = buf[i] >> 6;
258 dst[4 * i + 1] = buf[i] >> 4 & 3;
259 dst[4 * i + 2] = buf[i] >> 2 & 3;
260 dst[4 * i + 3] = buf[i] & 3;
265 } else if (context->is_lt_16bpp) {
266 uint8_t *dst = frame->buf[0]->data;
267 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
268 int swap = avctx->codec_tag >> 24;
270 if (packed && swap) {
271 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
272 if (!context->bitstream_buf)
273 return AVERROR(ENOMEM);
275 context->dsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
277 context->dsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
279 return AVERROR_INVALIDDATA;
280 buf = context->bitstream_buf;
283 if (desc->flags & AV_PIX_FMT_FLAG_BE)
284 scale16be(avctx, dst, buf, buf_size, packed);
286 scale16le(avctx, dst, buf, buf_size, packed);
289 } else if (need_copy) {
290 memcpy(frame->buf[0]->data, buf, buf_size);
291 buf = frame->buf[0]->data;
294 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
295 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
296 buf += buf_size - context->frame_size;
298 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
299 if (buf_size < len && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) {
300 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
301 av_buffer_unref(&frame->buf[0]);
302 return AVERROR(EINVAL);
305 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
306 avctx->width, avctx->height)) < 0) {
307 av_buffer_unref(&frame->buf[0]);
311 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
312 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
316 av_buffer_unref(&context->palette);
317 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
318 if (!context->palette) {
319 av_buffer_unref(&frame->buf[0]);
320 return AVERROR(ENOMEM);
322 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
323 frame->palette_has_changed = 1;
327 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
328 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
329 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
330 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
331 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
332 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
333 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
334 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
335 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
337 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
338 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
339 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
340 int la0 = FFALIGN(frame->linesize[0], linesize_align);
341 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
342 frame->linesize[0] = la0;
343 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
346 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
347 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
348 frame->buf[1] = av_buffer_ref(context->palette);
349 if (!frame->buf[1]) {
350 av_buffer_unref(&frame->buf[0]);
351 return AVERROR(ENOMEM);
353 frame->data[1] = frame->buf[1]->data;
356 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
357 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
358 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
361 flip(avctx, picture);
363 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
364 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
365 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
366 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
367 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
369 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
370 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
371 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
374 if (avctx->codec_tag == AV_RL32("yuv2") &&
375 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
377 uint8_t *line = picture->data[0];
378 for (y = 0; y < avctx->height; y++) {
379 for (x = 0; x < avctx->width; x++)
380 line[2 * x + 1] ^= 0x80;
381 line += picture->linesize[0];
384 if (avctx->codec_tag == AV_RL32("YVYU") &&
385 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
387 uint8_t *line = picture->data[0];
388 for(y = 0; y < avctx->height; y++) {
389 for(x = 0; x < avctx->width - 1; x += 2)
390 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
391 line += picture->linesize[0];
395 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
396 frame->interlaced_frame = 1;
397 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
398 frame->top_field_first = 1;
405 static av_cold int raw_close_decoder(AVCodecContext *avctx)
407 RawVideoContext *context = avctx->priv_data;
409 av_buffer_unref(&context->palette);
413 AVCodec ff_rawvideo_decoder = {
415 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
416 .type = AVMEDIA_TYPE_VIDEO,
417 .id = AV_CODEC_ID_RAWVIDEO,
418 .priv_data_size = sizeof(RawVideoContext),
419 .init = raw_init_decoder,
420 .close = raw_close_decoder,
421 .decode = raw_decode,
422 .priv_class = &rawdec_class,