3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "libavutil/buffer.h"
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/imgutils.h"
35 typedef struct RawVideoContext {
37 int frame_size; /* size of the frame in bytes */
39 int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
43 static const PixelFormatTag pix_fmt_bps_avi[] = {
44 { AV_PIX_FMT_PAL8, 4 },
45 { AV_PIX_FMT_PAL8, 8 },
46 { AV_PIX_FMT_RGB444, 12 },
47 { AV_PIX_FMT_RGB555, 15 },
48 { AV_PIX_FMT_RGB555, 16 },
49 { AV_PIX_FMT_BGR24, 24 },
50 { AV_PIX_FMT_RGB32, 32 },
51 { AV_PIX_FMT_NONE, 0 },
54 static const PixelFormatTag pix_fmt_bps_mov[] = {
55 { AV_PIX_FMT_MONOWHITE, 1 },
56 { AV_PIX_FMT_PAL8, 2 },
57 { AV_PIX_FMT_PAL8, 4 },
58 { AV_PIX_FMT_PAL8, 8 },
59 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
60 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
61 { AV_PIX_FMT_RGB555BE, 16 },
62 { AV_PIX_FMT_RGB24, 24 },
63 { AV_PIX_FMT_ARGB, 32 },
64 { AV_PIX_FMT_MONOWHITE,33 },
65 { AV_PIX_FMT_NONE, 0 },
68 static enum AVPixelFormat find_pix_fmt(const PixelFormatTag *tags,
71 while (tags->pix_fmt >= 0) {
72 if (tags->fourcc == fourcc)
76 return AV_PIX_FMT_YUV420P;
79 static av_cold int raw_init_decoder(AVCodecContext *avctx)
81 RawVideoContext *context = avctx->priv_data;
82 const AVPixFmtDescriptor *desc;
84 if (avctx->codec_tag == MKTAG('r', 'a', 'w', ' '))
85 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_mov,
86 avctx->bits_per_coded_sample);
87 else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
88 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi,
89 avctx->bits_per_coded_sample);
90 else if (avctx->codec_tag)
91 avctx->pix_fmt = find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
92 else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
93 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi,
94 avctx->bits_per_coded_sample);
96 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
98 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
99 return AVERROR(EINVAL);
102 if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL)) {
103 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
104 if (!context->palette)
105 return AVERROR(ENOMEM);
106 if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
107 avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
109 memset(context->palette->data, 0, AVPALETTE_SIZE);
112 context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
116 if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
117 avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
118 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ')))
119 context->is_2_4_bpp = 1;
121 if ((avctx->extradata_size >= 9 &&
122 !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
123 avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
124 avctx->codec_tag == MKTAG('W','R','A','W'))
127 if (avctx->codec_tag == AV_RL32("yuv2") &&
128 avctx->pix_fmt == AV_PIX_FMT_YUYV422)
129 context->is_yuv2 = 1;
134 static void flip(AVCodecContext *avctx, AVFrame *frame)
136 frame->data[0] += frame->linesize[0] * (avctx->height - 1);
137 frame->linesize[0] *= -1;
140 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
143 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
144 RawVideoContext *context = avctx->priv_data;
145 const uint8_t *buf = avpkt->data;
146 int buf_size = avpkt->size;
147 int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2;
150 AVFrame *frame = data;
152 frame->pict_type = AV_PICTURE_TYPE_I;
153 frame->key_frame = 1;
155 res = ff_decode_frame_props(avctx, frame);
159 if (buf_size < context->frame_size - (avctx->pix_fmt == AV_PIX_FMT_PAL8 ?
164 frame->buf[0] = av_buffer_alloc(context->frame_size);
166 frame->buf[0] = av_buffer_ref(avpkt->buf);
168 return AVERROR(ENOMEM);
170 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
171 if (context->is_2_4_bpp) {
173 uint8_t *dst = frame->buf[0]->data;
174 buf_size = context->frame_size - AVPALETTE_SIZE;
175 if (avctx->bits_per_coded_sample == 4) {
176 for (i = 0; 2 * i + 1 < buf_size; i++) {
177 dst[2 * i + 0] = buf[i] >> 4;
178 dst[2 * i + 1] = buf[i] & 15;
181 for (i = 0; 4 * i + 3 < buf_size; i++) {
182 dst[4 * i + 0] = buf[i] >> 6;
183 dst[4 * i + 1] = buf[i] >> 4 & 3;
184 dst[4 * i + 2] = buf[i] >> 2 & 3;
185 dst[4 * i + 3] = buf[i] & 3;
189 } else if (need_copy) {
190 memcpy(frame->buf[0]->data, buf, FFMIN(buf_size, context->frame_size));
191 buf = frame->buf[0]->data;
194 if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
195 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
196 buf += buf_size - context->frame_size;
198 if ((res = av_image_fill_arrays(frame->data, frame->linesize,
200 avctx->width, avctx->height, 1)) < 0)
203 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
204 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE,
208 av_buffer_unref(&context->palette);
209 context->palette = av_buffer_alloc(AVPALETTE_SIZE);
210 if (!context->palette)
211 return AVERROR(ENOMEM);
212 memcpy(context->palette->data, pal, AVPALETTE_SIZE);
213 frame->palette_has_changed = 1;
217 if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
218 (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
219 frame->buf[1] = av_buffer_ref(context->palette);
221 return AVERROR(ENOMEM);
222 frame->data[1] = frame->buf[1]->data;
224 if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
225 ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
226 frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
231 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
232 avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
233 avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
234 avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
235 FFSWAP(uint8_t *, frame->data[1], frame->data[2]);
237 if (avctx->codec_tag == AV_RL32("yuv2") &&
238 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
240 uint8_t *line = frame->data[0];
241 for (y = 0; y < avctx->height; y++) {
242 for (x = 0; x < avctx->width; x++)
243 line[2 * x + 1] ^= 0x80;
244 line += frame->linesize[0];
252 static av_cold int raw_close_decoder(AVCodecContext *avctx)
254 RawVideoContext *context = avctx->priv_data;
256 av_buffer_unref(&context->palette);
260 AVCodec ff_rawvideo_decoder = {
262 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
263 .type = AVMEDIA_TYPE_VIDEO,
264 .id = AV_CODEC_ID_RAWVIDEO,
265 .priv_data_size = sizeof(RawVideoContext),
266 .init = raw_init_decoder,
267 .close = raw_close_decoder,
268 .decode = raw_decode,