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 & 0x1f);
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 & 0x1f) == 4 || (avctx->bits_per_coded_sample & 0x1f) == 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 & 0x1f) == 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 & 0x1f) == 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 (need_copy) {
230 memcpy(frame->buf[0]->data, buf, buf_size);
231 buf = frame->buf[0]->data;
234 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
235 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
236 buf += buf_size - context->frame_size;
238 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
239 if (buf_size < len) {
240 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
241 av_buffer_unref(&frame->buf[0]);
242 return AVERROR(EINVAL);
245 if (context->is_lt_16bpp) {
247 uint8_t *dst = frame->buf[0]->data;
248 if (desc->flags & AV_PIX_FMT_FLAG_BE) {
249 for (i = 0; i + 1 < buf_size; i += 2)
250 AV_WB16(dst + i, AV_RB16(buf + i) << (16 - avctx->bits_per_coded_sample));
252 for (i = 0; i + 1 < buf_size; i += 2)
253 AV_WL16(dst + i, AV_RL16(buf + i) << (16 - avctx->bits_per_coded_sample));
258 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
259 avctx->width, avctx->height)) < 0) {
260 av_buffer_unref(&frame->buf[0]);
264 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
265 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
269 av_buffer_unref(&context->palette);
270 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
271 if (!context->palette) {
272 av_buffer_unref(&frame->buf[0]);
273 return AVERROR(ENOMEM);
275 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
276 frame->palette_has_changed = 1;
280 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
281 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
282 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
283 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
284 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
285 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
286 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
287 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
288 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
290 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
291 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
292 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
293 int la0 = FFALIGN(frame->linesize[0], linesize_align);
294 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
295 frame->linesize[0] = la0;
296 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
299 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
300 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
301 frame->buf[1] = av_buffer_ref(context->palette);
302 if (!frame->buf[1]) {
303 av_buffer_unref(&frame->buf[0]);
304 return AVERROR(ENOMEM);
306 frame->data[1] = frame->buf[1]->data;
309 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
310 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
311 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
314 flip(avctx, picture);
316 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
317 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
318 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
319 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
320 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
322 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
323 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
324 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
327 if (avctx->codec_tag == AV_RL32("yuv2") &&
328 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
330 uint8_t *line = picture->data[0];
331 for (y = 0; y < avctx->height; y++) {
332 for (x = 0; x < avctx->width; x++)
333 line[2 * x + 1] ^= 0x80;
334 line += picture->linesize[0];
337 if (avctx->codec_tag == AV_RL32("YVYU") &&
338 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
340 uint8_t *line = picture->data[0];
341 for(y = 0; y < avctx->height; y++) {
342 for(x = 0; x < avctx->width - 1; x += 2)
343 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
344 line += picture->linesize[0];
348 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
349 frame->interlaced_frame = 1;
350 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
351 frame->top_field_first = 1;
358 static av_cold int raw_close_decoder(AVCodecContext *avctx)
360 RawVideoContext *context = avctx->priv_data;
362 av_buffer_unref(&context->palette);
366 AVCodec ff_rawvideo_decoder = {
368 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
369 .type = AVMEDIA_TYPE_VIDEO,
370 .id = AV_CODEC_ID_RAWVIDEO,
371 .priv_data_size = sizeof(RawVideoContext),
372 .init = raw_init_decoder,
373 .close = raw_close_decoder,
374 .decode = raw_decode,
375 .priv_class = &rawdec_class,