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 #if LIBAVCODEC_VERSION_MAJOR < 55
66 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
68 return avpriv_find_pix_fmt(tags, fourcc);
72 static av_cold int raw_init_decoder(AVCodecContext *avctx)
74 RawVideoContext *context = avctx->priv_data;
75 const AVPixFmtDescriptor *desc;
77 ff_dsputil_init(&context->dsp, avctx);
79 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
80 || avctx->codec_tag == MKTAG('N','O','1','6'))
81 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov,
82 avctx->bits_per_coded_sample);
83 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
84 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
85 avctx->bits_per_coded_sample);
86 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
87 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
88 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
89 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
90 avctx->bits_per_coded_sample);
92 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
94 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
95 return AVERROR(EINVAL);
98 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
99 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
100 if (!context->palette)
101 return AVERROR(ENOMEM);
102 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
103 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
105 memset(context->palette->data, 0, AVPALETTE_SIZE);
108 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
109 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
110 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
111 context->is_2_4_bpp = 1;
112 context->frame_size = avpicture_get_size(avctx->pix_fmt,
113 FFALIGN(avctx->width, 16),
116 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
117 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
121 if ((avctx->extradata_size >= 9 &&
122 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
123 avctx->codec_tag == MKTAG('c','y','u','v') ||
124 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
125 avctx->codec_tag == MKTAG('W','R','A','W'))
128 if (avctx->codec_tag == AV_RL32("yuv2") &&
129 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
130 context->is_yuv2 = 1;
135 static void flip(AVCodecContext *avctx, AVPicture *picture)
137 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
138 picture->linesize[0] *= -1;
142 * Scale sample to 16-bit resolution
144 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
147 * Scale buffer to 16 bits per coded sample resolution
149 #define MKSCALE16(name, r16, w16) \
150 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
154 for (i = 0; i + 1 < buf_size; i += 2) \
155 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
158 init_get_bits(&gb, buf, buf_size * 8); \
159 for (i = 0; i < avctx->width * avctx->height; i++) { \
160 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
161 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
166 MKSCALE16(scale16be, AV_RB16, AV_WB16)
167 MKSCALE16(scale16le, AV_RL16, AV_WL16)
169 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
172 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
173 RawVideoContext *context = avctx->priv_data;
174 const uint8_t *buf = avpkt->data;
175 int buf_size = avpkt->size;
176 int linesize_align = 4;
178 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
180 AVFrame *frame = data;
181 AVPicture *picture = data;
183 frame->pict_type = AV_PICTURE_TYPE_I;
184 frame->key_frame = 1;
186 res = ff_decode_frame_props(avctx, frame);
190 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
191 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
193 if (context->tff >= 0) {
194 frame->interlaced_frame = 1;
195 frame->top_field_first = context->tff;
198 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
202 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
204 frame->buf[0] = av_buffer_ref(avpkt->buf);
206 return AVERROR(ENOMEM);
208 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
209 if (context->is_2_4_bpp) {
211 uint8_t *dst = frame->buf[0]->data;
212 buf_size = context->frame_size - AVPALETTE_SIZE;
213 if (avctx->bits_per_coded_sample == 4) {
214 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
215 dst[2 * i + 0] = buf[i] >> 4;
216 dst[2 * i + 1] = buf[i] & 15;
220 av_assert0(avctx->bits_per_coded_sample == 2);
221 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
222 dst[4 * i + 0] = buf[i] >> 6;
223 dst[4 * i + 1] = buf[i] >> 4 & 3;
224 dst[4 * i + 2] = buf[i] >> 2 & 3;
225 dst[4 * i + 3] = buf[i] & 3;
230 } else if (context->is_lt_16bpp) {
231 uint8_t *dst = frame->buf[0]->data;
232 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
233 int swap = avctx->codec_tag >> 24;
235 if (packed && swap) {
236 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
237 if (!context->bitstream_buf)
238 return AVERROR(ENOMEM);
240 context->dsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
242 context->dsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
244 return AVERROR_INVALIDDATA;
245 buf = context->bitstream_buf;
248 if (desc->flags & AV_PIX_FMT_FLAG_BE)
249 scale16be(avctx, dst, buf, buf_size, packed);
251 scale16le(avctx, dst, buf, buf_size, packed);
254 } else if (need_copy) {
255 memcpy(frame->buf[0]->data, buf, buf_size);
256 buf = frame->buf[0]->data;
259 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
260 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
261 buf += buf_size - context->frame_size;
263 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
264 if (buf_size < len && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) {
265 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
266 av_buffer_unref(&frame->buf[0]);
267 return AVERROR(EINVAL);
270 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
271 avctx->width, avctx->height)) < 0) {
272 av_buffer_unref(&frame->buf[0]);
276 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
277 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
281 av_buffer_unref(&context->palette);
282 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
283 if (!context->palette) {
284 av_buffer_unref(&frame->buf[0]);
285 return AVERROR(ENOMEM);
287 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
288 frame->palette_has_changed = 1;
292 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
293 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
294 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
295 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
296 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
297 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
298 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
299 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
300 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
302 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
303 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
304 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
305 int la0 = FFALIGN(frame->linesize[0], linesize_align);
306 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
307 frame->linesize[0] = la0;
308 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
311 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
312 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
313 frame->buf[1] = av_buffer_ref(context->palette);
314 if (!frame->buf[1]) {
315 av_buffer_unref(&frame->buf[0]);
316 return AVERROR(ENOMEM);
318 frame->data[1] = frame->buf[1]->data;
321 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
322 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
323 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
326 flip(avctx, picture);
328 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
329 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
330 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
331 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
332 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
334 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
335 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
336 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
339 if (avctx->codec_tag == AV_RL32("yuv2") &&
340 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
342 uint8_t *line = picture->data[0];
343 for (y = 0; y < avctx->height; y++) {
344 for (x = 0; x < avctx->width; x++)
345 line[2 * x + 1] ^= 0x80;
346 line += picture->linesize[0];
350 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
351 frame->interlaced_frame = 1;
352 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
353 frame->top_field_first = 1;
360 static av_cold int raw_close_decoder(AVCodecContext *avctx)
362 RawVideoContext *context = avctx->priv_data;
364 av_buffer_unref(&context->palette);
368 AVCodec ff_rawvideo_decoder = {
370 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
371 .type = AVMEDIA_TYPE_VIDEO,
372 .id = AV_CODEC_ID_RAWVIDEO,
373 .priv_data_size = sizeof(RawVideoContext),
374 .init = raw_init_decoder,
375 .close = raw_close_decoder,
376 .decode = raw_decode,
377 .priv_class = &rawdec_class,