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
30 #include "libavutil/avassert.h"
31 #include "libavutil/buffer.h"
32 #include "libavutil/common.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/opt.h"
37 typedef struct RawVideoContext {
40 int frame_size; /* size of the frame in bytes */
42 int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
44 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
48 static const AVOption options[]={
49 {"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},
53 static const AVClass rawdec_class = {
54 .class_name = "rawdec",
56 .version = LIBAVUTIL_VERSION_INT,
59 static const PixelFormatTag pix_fmt_bps_avi[] = {
60 { AV_PIX_FMT_MONOWHITE, 1 },
61 { AV_PIX_FMT_PAL8, 2 },
62 { AV_PIX_FMT_PAL8, 4 },
63 { AV_PIX_FMT_PAL8, 8 },
64 { AV_PIX_FMT_RGB444LE, 12 },
65 { AV_PIX_FMT_RGB555LE, 15 },
66 { AV_PIX_FMT_RGB555LE, 16 },
67 { AV_PIX_FMT_BGR24, 24 },
68 { AV_PIX_FMT_BGRA, 32 },
69 { AV_PIX_FMT_NONE, 0 },
72 static const PixelFormatTag pix_fmt_bps_mov[] = {
73 { AV_PIX_FMT_MONOWHITE, 1 },
74 { AV_PIX_FMT_PAL8, 2 },
75 { AV_PIX_FMT_PAL8, 4 },
76 { AV_PIX_FMT_PAL8, 8 },
77 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
78 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
79 { AV_PIX_FMT_RGB555BE, 16 },
80 { AV_PIX_FMT_RGB24, 24 },
81 { AV_PIX_FMT_ARGB, 32 },
82 { AV_PIX_FMT_MONOWHITE,33 },
83 { AV_PIX_FMT_NONE, 0 },
86 enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
89 while (tags->pix_fmt >= 0) {
90 if (tags->fourcc == fourcc)
94 return AV_PIX_FMT_NONE;
97 #if LIBAVCODEC_VERSION_MAJOR < 55
98 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
100 return avpriv_find_pix_fmt(tags, fourcc);
104 static av_cold int raw_init_decoder(AVCodecContext *avctx)
106 RawVideoContext *context = avctx->priv_data;
107 const AVPixFmtDescriptor *desc;
109 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
110 || avctx->codec_tag == MKTAG('N','O','1','6'))
111 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
112 avctx->bits_per_coded_sample);
113 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
114 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
115 avctx->bits_per_coded_sample);
116 else if (avctx->codec_tag)
117 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
118 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
119 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
120 avctx->bits_per_coded_sample);
122 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
124 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
125 return AVERROR(EINVAL);
128 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
129 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
130 if (!context->palette)
131 return AVERROR(ENOMEM);
132 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
133 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
135 memset(context->palette->data, 0, AVPALETTE_SIZE);
138 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
139 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
140 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
141 context->is_2_4_bpp = 1;
142 context->frame_size = avpicture_get_size(avctx->pix_fmt,
143 FFALIGN(avctx->width, 16),
146 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
147 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
151 if ((avctx->extradata_size >= 9 &&
152 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
153 avctx->codec_tag == MKTAG('c','y','u','v') ||
154 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
155 avctx->codec_tag == MKTAG('W','R','A','W'))
158 if (avctx->codec_tag == AV_RL32("yuv2") &&
159 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
160 context->is_yuv2 = 1;
165 static void flip(AVCodecContext *avctx, AVPicture *picture)
167 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
168 picture->linesize[0] *= -1;
171 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
174 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
175 RawVideoContext *context = avctx->priv_data;
176 const uint8_t *buf = avpkt->data;
177 int buf_size = avpkt->size;
178 int linesize_align = 4;
180 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
182 AVFrame *frame = data;
183 AVPicture *picture = data;
185 frame->pict_type = AV_PICTURE_TYPE_I;
186 frame->key_frame = 1;
187 frame->reordered_opaque = avctx->reordered_opaque;
188 frame->pkt_pts = avctx->internal->pkt->pts;
189 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
190 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
192 if (context->tff >= 0) {
193 frame->interlaced_frame = 1;
194 frame->top_field_first = context->tff;
197 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
201 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
203 frame->buf[0] = av_buffer_ref(avpkt->buf);
205 return AVERROR(ENOMEM);
207 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
208 if (context->is_2_4_bpp) {
210 uint8_t *dst = frame->buf[0]->data;
211 buf_size = context->frame_size - AVPALETTE_SIZE;
212 if (avctx->bits_per_coded_sample == 4) {
213 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
214 dst[2 * i + 0] = buf[i] >> 4;
215 dst[2 * i + 1] = buf[i] & 15;
219 av_assert0(avctx->bits_per_coded_sample == 2);
220 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
221 dst[4 * i + 0] = buf[i] >> 6;
222 dst[4 * i + 1] = buf[i] >> 4 & 3;
223 dst[4 * i + 2] = buf[i] >> 2 & 3;
224 dst[4 * i + 3] = buf[i] & 3;
229 } else if (context->is_lt_16bpp) {
231 uint8_t *dst = frame->buf[0]->data;
232 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
233 for (i = 0; i + 1 < buf_size; i += 2)
234 AV_WB16(dst + i, AV_RB16(buf + i) << (16 - avctx->bits_per_coded_sample));
236 for (i = 0; i + 1 < buf_size; i += 2)
237 AV_WL16(dst + i, AV_RL16(buf + i) << (16 - avctx->bits_per_coded_sample));
240 } else if (need_copy) {
241 memcpy(frame->buf[0]->data, buf, buf_size);
242 buf = frame->buf[0]->data;
245 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
246 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
247 buf += buf_size - context->frame_size;
249 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
250 if (buf_size < len) {
251 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
252 av_buffer_unref(&frame->buf[0]);
253 return AVERROR(EINVAL);
256 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
257 avctx->width, avctx->height)) < 0) {
258 av_buffer_unref(&frame->buf[0]);
262 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
263 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
267 av_buffer_unref(&context->palette);
268 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
269 if (!context->palette) {
270 av_buffer_unref(&frame->buf[0]);
271 return AVERROR(ENOMEM);
273 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
274 frame->palette_has_changed = 1;
278 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
279 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
280 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
281 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
282 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
283 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
284 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
285 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
286 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
288 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
289 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
290 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
291 int la0 = FFALIGN(frame->linesize[0], linesize_align);
292 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
293 frame->linesize[0] = la0;
294 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
297 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
298 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
299 frame->buf[1] = av_buffer_ref(context->palette);
300 if (!frame->buf[1]) {
301 av_buffer_unref(&frame->buf[0]);
302 return AVERROR(ENOMEM);
304 frame->data[1] = frame->buf[1]->data;
307 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
308 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
309 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
312 flip(avctx, picture);
314 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
315 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
316 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
317 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
318 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
320 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
321 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
322 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
325 if (avctx->codec_tag == AV_RL32("yuv2") &&
326 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
328 uint8_t *line = picture->data[0];
329 for (y = 0; y < avctx->height; y++) {
330 for (x = 0; x < avctx->width; x++)
331 line[2 * x + 1] ^= 0x80;
332 line += picture->linesize[0];
335 if (avctx->codec_tag == AV_RL32("YVYU") &&
336 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
338 uint8_t *line = picture->data[0];
339 for(y = 0; y < avctx->height; y++) {
340 for(x = 0; x < avctx->width - 1; x += 2)
341 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
342 line += picture->linesize[0];
346 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
347 frame->interlaced_frame = 1;
348 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
349 frame->top_field_first = 1;
356 static av_cold int raw_close_decoder(AVCodecContext *avctx)
358 RawVideoContext *context = avctx->priv_data;
360 av_buffer_unref(&context->palette);
364 AVCodec ff_rawvideo_decoder = {
366 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
367 .type = AVMEDIA_TYPE_VIDEO,
368 .id = AV_CODEC_ID_RAWVIDEO,
369 .priv_data_size = sizeof(RawVideoContext),
370 .init = raw_init_decoder,
371 .close = raw_close_decoder,
372 .decode = raw_decode,
373 .priv_class = &rawdec_class,