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
29 #include "libavutil/avassert.h"
30 #include "libavutil/buffer.h"
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/imgutils.h"
34 #include "libavutil/opt.h"
36 typedef struct RawVideoContext {
39 int frame_size; /* size of the frame in bytes */
41 int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
46 static const AVOption options[]={
47 {"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},
51 static const AVClass class = {
52 .class_name = "rawdec",
54 .version = LIBAVUTIL_VERSION_INT,
57 static const PixelFormatTag pix_fmt_bps_avi[] = {
58 { AV_PIX_FMT_MONOWHITE, 1 },
59 { AV_PIX_FMT_PAL8, 2 },
60 { AV_PIX_FMT_PAL8, 4 },
61 { AV_PIX_FMT_PAL8, 8 },
62 { AV_PIX_FMT_RGB444LE, 12 },
63 { AV_PIX_FMT_RGB555LE, 15 },
64 { AV_PIX_FMT_RGB555LE, 16 },
65 { AV_PIX_FMT_BGR24, 24 },
66 { AV_PIX_FMT_BGRA, 32 },
67 { AV_PIX_FMT_NONE, 0 },
70 static const PixelFormatTag pix_fmt_bps_mov[] = {
71 { AV_PIX_FMT_MONOWHITE, 1 },
72 { AV_PIX_FMT_PAL8, 2 },
73 { AV_PIX_FMT_PAL8, 4 },
74 { AV_PIX_FMT_PAL8, 8 },
75 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
76 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
77 { AV_PIX_FMT_RGB555BE, 16 },
78 { AV_PIX_FMT_RGB24, 24 },
79 { AV_PIX_FMT_ARGB, 32 },
80 { AV_PIX_FMT_MONOWHITE,33 },
81 { AV_PIX_FMT_NONE, 0 },
84 enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
87 while (tags->pix_fmt >= 0) {
88 if (tags->fourcc == fourcc)
92 return AV_PIX_FMT_NONE;
95 #if LIBAVCODEC_VERSION_MAJOR < 55
96 enum AVPixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
98 return avpriv_find_pix_fmt(tags, fourcc);
102 static av_cold int raw_init_decoder(AVCodecContext *avctx)
104 RawVideoContext *context = avctx->priv_data;
105 const AVPixFmtDescriptor *desc;
107 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
108 || avctx->codec_tag == MKTAG('N','O','1','6'))
109 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_mov,
110 avctx->bits_per_coded_sample);
111 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
112 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
113 avctx->bits_per_coded_sample);
114 else if (avctx->codec_tag)
115 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
116 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
117 avctx->pix_fmt = avpriv_find_pix_fmt(pix_fmt_bps_avi,
118 avctx->bits_per_coded_sample);
120 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
122 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
123 return AVERROR(EINVAL);
126 if (desc->flags & (PIX_FMT_PAL | PIX_FMT_PSEUDOPAL)) {
127 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
128 if (!context->palette)
129 return AVERROR(ENOMEM);
130 if (desc->flags & PIX_FMT_PSEUDOPAL)
131 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
133 memset(context->palette->data, 0, AVPALETTE_SIZE);
136 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
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;
143 if ((avctx->extradata_size >= 9 &&
144 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
145 avctx->codec_tag == MKTAG('c','y','u','v') ||
146 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
147 avctx->codec_tag == MKTAG('W','R','A','W'))
150 if (avctx->codec_tag == AV_RL32("yuv2") &&
151 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
152 context->is_yuv2 = 1;
157 static void flip(AVCodecContext *avctx, AVPicture *picture)
159 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
160 picture->linesize[0] *= -1;
163 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
166 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
167 RawVideoContext *context = avctx->priv_data;
168 const uint8_t *buf = avpkt->data;
169 int buf_size = avpkt->size;
170 int linesize_align = 4;
172 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2;
174 AVFrame *frame = data;
175 AVPicture *picture = data;
177 frame->pict_type = AV_PICTURE_TYPE_I;
178 frame->key_frame = 1;
179 frame->reordered_opaque = avctx->reordered_opaque;
180 frame->pkt_pts = avctx->pkt->pts;
181 av_frame_set_pkt_pos (frame, avctx->pkt->pos);
182 av_frame_set_pkt_duration(frame, avctx->pkt->duration);
184 if (context->tff >= 0) {
185 frame->interlaced_frame = 1;
186 frame->top_field_first = context->tff;
189 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
193 frame->buf[0] = av_buffer_alloc(context->frame_size);
195 frame->buf[0] = av_buffer_ref(avpkt->buf);
197 return AVERROR(ENOMEM);
199 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
200 if (context->is_2_4_bpp) {
202 uint8_t *dst = frame->buf[0]->data;
203 buf_size = context->frame_size - AVPALETTE_SIZE;
204 if (avctx->bits_per_coded_sample == 4) {
205 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
206 dst[2 * i + 0] = buf[i] >> 4;
207 dst[2 * i + 1] = buf[i] & 15;
211 av_assert0(avctx->bits_per_coded_sample == 2);
212 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
213 dst[4 * i + 0] = buf[i] >> 6;
214 dst[4 * i + 1] = buf[i] >> 4 & 3;
215 dst[4 * i + 2] = buf[i] >> 2 & 3;
216 dst[4 * i + 3] = buf[i] & 3;
221 } else if (need_copy) {
222 memcpy(frame->buf[0]->data, buf, FFMIN(buf_size, context->frame_size));
223 buf = frame->buf[0]->data;
226 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
227 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
228 buf += buf_size - context->frame_size;
230 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
231 if (buf_size < len) {
232 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
233 av_buffer_unref(&frame->buf[0]);
234 return AVERROR(EINVAL);
237 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
238 avctx->width, avctx->height)) < 0) {
239 av_buffer_unref(&frame->buf[0]);
243 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
244 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
248 av_buffer_unref(&context->palette);
249 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
250 if (!context->palette) {
251 av_buffer_unref(&frame->buf[0]);
252 return AVERROR(ENOMEM);
254 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
255 frame->palette_has_changed = 1;
259 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
260 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
261 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
262 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
263 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
264 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
265 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
266 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
267 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
269 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
270 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
271 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
272 int la0 = FFALIGN(frame->linesize[0], linesize_align);
273 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
274 frame->linesize[0] = la0;
275 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
278 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
279 (desc->flags & PIX_FMT_PSEUDOPAL)) {
280 frame->buf[1] = av_buffer_ref(context->palette);
281 if (!frame->buf[1]) {
282 av_buffer_unref(&frame->buf[0]);
283 return AVERROR(ENOMEM);
285 frame->data[1] = frame->buf[1]->data;
288 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
289 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
290 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
293 flip(avctx, picture);
295 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
296 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
297 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
298 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
299 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
301 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
302 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
303 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
306 if (avctx->codec_tag == AV_RL32("yuv2") &&
307 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
309 uint8_t *line = picture->data[0];
310 for (y = 0; y < avctx->height; y++) {
311 for (x = 0; x < avctx->width; x++)
312 line[2 * x + 1] ^= 0x80;
313 line += picture->linesize[0];
316 if (avctx->codec_tag == AV_RL32("YVYU") &&
317 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
319 uint8_t *line = picture->data[0];
320 for(y = 0; y < avctx->height; y++) {
321 for(x = 0; x < avctx->width - 1; x += 2)
322 FFSWAP(uint8_t, line[2*x + 1], line[2*x + 3]);
323 line += picture->linesize[0];
327 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
328 frame->interlaced_frame = 1;
329 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
330 frame->top_field_first = 1;
337 static av_cold int raw_close_decoder(AVCodecContext *avctx)
339 RawVideoContext *context = avctx->priv_data;
341 av_buffer_unref(&context->palette);
345 AVCodec ff_rawvideo_decoder = {
347 .type = AVMEDIA_TYPE_VIDEO,
348 .id = AV_CODEC_ID_RAWVIDEO,
349 .priv_data_size = sizeof(RawVideoContext),
350 .init = raw_init_decoder,
351 .close = raw_close_decoder,
352 .decode = raw_decode,
353 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
354 .priv_class = &class,