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
49 BswapDSPContext bbdsp;
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 av_cold int raw_init_decoder(AVCodecContext *avctx)
67 RawVideoContext *context = avctx->priv_data;
68 const AVPixFmtDescriptor *desc;
70 ff_bswapdsp_init(&context->bbdsp);
72 if ( avctx->codec_tag == MKTAG('r','a','w',' ')
73 || avctx->codec_tag == MKTAG('N','O','1','6'))
74 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov,
75 avctx->bits_per_coded_sample);
76 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
77 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
78 avctx->bits_per_coded_sample);
79 else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
80 avctx->pix_fmt = avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
81 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
82 avctx->pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
83 avctx->bits_per_coded_sample);
85 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
87 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
88 return AVERROR(EINVAL);
91 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
92 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
93 if (!context->palette)
94 return AVERROR(ENOMEM);
95 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
96 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
98 memset(context->palette->data, 0, AVPALETTE_SIZE);
101 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
102 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
103 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
104 context->is_2_4_bpp = 1;
105 context->frame_size = avpicture_get_size(avctx->pix_fmt,
106 FFALIGN(avctx->width, 16),
109 context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
110 context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
114 if ((avctx->extradata_size >= 9 &&
115 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
116 avctx->codec_tag == MKTAG('c','y','u','v') ||
117 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
118 avctx->codec_tag == MKTAG('W','R','A','W'))
121 if (avctx->codec_tag == AV_RL32("yuv2") &&
122 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
123 context->is_yuv2 = 1;
128 static void flip(AVCodecContext *avctx, AVPicture *picture)
130 picture->data[0] += picture->linesize[0] * (avctx->height - 1);
131 picture->linesize[0] *= -1;
135 * Scale sample to 16-bit resolution
137 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
140 * Scale buffer to 16 bits per coded sample resolution
142 #define MKSCALE16(name, r16, w16) \
143 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
147 for (i = 0; i + 1 < buf_size; i += 2) \
148 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
151 init_get_bits(&gb, buf, buf_size * 8); \
152 for (i = 0; i < avctx->width * avctx->height; i++) { \
153 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
154 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
159 MKSCALE16(scale16be, AV_RB16, AV_WB16)
160 MKSCALE16(scale16le, AV_RL16, AV_WL16)
162 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
165 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
166 RawVideoContext *context = avctx->priv_data;
167 const uint8_t *buf = avpkt->data;
168 int buf_size = avpkt->size;
169 int linesize_align = 4;
171 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
173 AVFrame *frame = data;
174 AVPicture *picture = data;
176 frame->pict_type = AV_PICTURE_TYPE_I;
177 frame->key_frame = 1;
179 res = ff_decode_frame_props(avctx, frame);
183 av_frame_set_pkt_pos (frame, avctx->internal->pkt->pos);
184 av_frame_set_pkt_duration(frame, avctx->internal->pkt->duration);
186 if (context->tff >= 0) {
187 frame->interlaced_frame = 1;
188 frame->top_field_first = context->tff;
191 if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
195 frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
197 frame->buf[0] = av_buffer_ref(avpkt->buf);
199 return AVERROR(ENOMEM);
201 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
202 if (context->is_2_4_bpp) {
204 uint8_t *dst = frame->buf[0]->data;
205 buf_size = context->frame_size - AVPALETTE_SIZE;
206 if (avctx->bits_per_coded_sample == 4) {
207 for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
208 dst[2 * i + 0] = buf[i] >> 4;
209 dst[2 * i + 1] = buf[i] & 15;
213 av_assert0(avctx->bits_per_coded_sample == 2);
214 for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
215 dst[4 * i + 0] = buf[i] >> 6;
216 dst[4 * i + 1] = buf[i] >> 4 & 3;
217 dst[4 * i + 2] = buf[i] >> 2 & 3;
218 dst[4 * i + 3] = buf[i] & 3;
223 } else if (context->is_lt_16bpp) {
224 uint8_t *dst = frame->buf[0]->data;
225 int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
226 int swap = avctx->codec_tag >> 24;
228 if (packed && swap) {
229 av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
230 if (!context->bitstream_buf)
231 return AVERROR(ENOMEM);
233 context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
235 context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
237 return AVERROR_INVALIDDATA;
238 buf = context->bitstream_buf;
241 if (desc->flags & AV_PIX_FMT_FLAG_BE)
242 scale16be(avctx, dst, buf, buf_size, packed);
244 scale16le(avctx, dst, buf, buf_size, packed);
247 } else if (need_copy) {
248 memcpy(frame->buf[0]->data, buf, buf_size);
249 buf = frame->buf[0]->data;
252 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
253 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
254 buf += buf_size - context->frame_size;
256 len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
257 if (buf_size < len && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0)) {
258 av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
259 av_buffer_unref(&frame->buf[0]);
260 return AVERROR(EINVAL);
263 if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
264 avctx->width, avctx->height)) < 0) {
265 av_buffer_unref(&frame->buf[0]);
269 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
270 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
274 av_buffer_unref(&context->palette);
275 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
276 if (!context->palette) {
277 av_buffer_unref(&frame->buf[0]);
278 return AVERROR(ENOMEM);
280 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
281 frame->palette_has_changed = 1;
285 if ((avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
286 avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
287 avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
288 avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
289 avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
290 avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
291 avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
292 FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
293 frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
295 if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
296 FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
297 FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
298 int la0 = FFALIGN(frame->linesize[0], linesize_align);
299 frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
300 frame->linesize[0] = la0;
301 frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
304 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
305 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
306 frame->buf[1] = av_buffer_ref(context->palette);
307 if (!frame->buf[1]) {
308 av_buffer_unref(&frame->buf[0]);
309 return AVERROR(ENOMEM);
311 frame->data[1] = frame->buf[1]->data;
314 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
315 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
316 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
319 flip(avctx, picture);
321 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
322 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
323 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
324 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
325 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
327 if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
328 picture->data[1] = picture->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
329 picture->data[2] = picture->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
332 if (avctx->codec_tag == AV_RL32("yuv2") &&
333 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
335 uint8_t *line = picture->data[0];
336 for (y = 0; y < avctx->height; y++) {
337 for (x = 0; x < avctx->width; x++)
338 line[2 * x + 1] ^= 0x80;
339 line += picture->linesize[0];
343 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
344 frame->interlaced_frame = 1;
345 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
346 frame->top_field_first = 1;
353 static av_cold int raw_close_decoder(AVCodecContext *avctx)
355 RawVideoContext *context = avctx->priv_data;
357 av_buffer_unref(&context->palette);
361 AVCodec ff_rawvideo_decoder = {
363 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
364 .type = AVMEDIA_TYPE_VIDEO,
365 .id = AV_CODEC_ID_RAWVIDEO,
366 .priv_data_size = sizeof(RawVideoContext),
367 .init = raw_init_decoder,
368 .close = raw_close_decoder,
369 .decode = raw_decode,
370 .priv_class = &rawdec_class,