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 typedef struct RawVideoContext {
30 unsigned char * buffer; /* block of memory for holding one frame */
31 int length; /* number of bytes in buffer */
32 AVFrame pic; ///< AVCodecContext.coded_frame
35 typedef struct PixelFormatTag {
40 static const PixelFormatTag pixelFormatTags[] = {
41 { PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') }, /* Planar formats */
42 { PIX_FMT_YUV420P, MKTAG('I', 'Y', 'U', 'V') },
43 { PIX_FMT_YUV420P, MKTAG('Y', 'V', '1', '2') },
44 { PIX_FMT_YUV410P, MKTAG('Y', 'U', 'V', '9') },
45 { PIX_FMT_YUV411P, MKTAG('Y', '4', '1', 'B') },
46 { PIX_FMT_YUV422P, MKTAG('Y', '4', '2', 'B') },
47 { PIX_FMT_GRAY8, MKTAG('Y', '8', '0', '0') },
48 { PIX_FMT_GRAY8, MKTAG(' ', ' ', 'Y', '8') },
51 { PIX_FMT_YUV422, MKTAG('Y', 'U', 'Y', '2') }, /* Packed formats */
52 { PIX_FMT_YUV422, MKTAG('Y', '4', '2', '2') },
53 { PIX_FMT_UYVY422, MKTAG('U', 'Y', 'V', 'Y') },
54 { PIX_FMT_GRAY8, MKTAG('G', 'R', 'E', 'Y') },
55 { PIX_FMT_RGB555, MKTAG('R', 'G', 'B', 15) },
56 { PIX_FMT_BGR555, MKTAG('B', 'G', 'R', 15) },
57 { PIX_FMT_RGB565, MKTAG('R', 'G', 'B', 16) },
58 { PIX_FMT_BGR565, MKTAG('B', 'G', 'R', 16) },
61 { PIX_FMT_UYVY422, MKTAG('2', 'v', 'u', 'y') },
66 static int findPixelFormat(unsigned int fourcc)
68 const PixelFormatTag * tags = pixelFormatTags;
69 while (tags->pix_fmt >= 0) {
70 if (tags->fourcc == fourcc)
74 return PIX_FMT_YUV420P;
77 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat fmt)
79 const PixelFormatTag * tags = pixelFormatTags;
80 while (tags->pix_fmt >= 0) {
81 if (tags->pix_fmt == fmt)
88 /* RAW Decoder Implementation */
90 static int raw_init_decoder(AVCodecContext *avctx)
92 RawVideoContext *context = avctx->priv_data;
95 avctx->pix_fmt = findPixelFormat(avctx->codec_tag);
96 else if (avctx->bits_per_sample){
97 switch(avctx->bits_per_sample){
98 case 8: avctx->pix_fmt= PIX_FMT_PAL8 ; break;
99 case 15: avctx->pix_fmt= PIX_FMT_RGB555; break;
100 case 16: avctx->pix_fmt= PIX_FMT_RGB555; break;
101 case 24: avctx->pix_fmt= PIX_FMT_BGR24 ; break;
102 case 32: avctx->pix_fmt= PIX_FMT_RGBA32; break;
106 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
107 context->buffer = av_malloc(context->length);
108 context->pic.pict_type = FF_I_TYPE;
109 context->pic.key_frame = 1;
111 avctx->coded_frame= &context->pic;
113 if (!context->buffer)
119 static void flip(AVCodecContext *avctx, AVPicture * picture){
120 if(!avctx->codec_tag && avctx->bits_per_sample && picture->linesize[2]==0){
121 picture->data[0] += picture->linesize[0] * (avctx->height-1);
122 picture->linesize[0] *= -1;
126 static int raw_decode(AVCodecContext *avctx,
127 void *data, int *data_size,
128 uint8_t *buf, int buf_size)
130 RawVideoContext *context = avctx->priv_data;
132 AVFrame * frame = (AVFrame *) data;
133 AVPicture * picture = (AVPicture *) data;
135 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
136 frame->top_field_first = avctx->coded_frame->top_field_first;
138 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
141 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
142 if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
143 frame->data[1]= context->buffer;
145 if (avctx->palctrl && avctx->palctrl->palette_changed) {
146 memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
147 avctx->palctrl->palette_changed = 0;
150 flip(avctx, picture);
152 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2'))
155 unsigned char *tmp = picture->data[1];
156 picture->data[1] = picture->data[2];
157 picture->data[2] = tmp;
160 *data_size = sizeof(AVPicture);
164 static int raw_close_decoder(AVCodecContext *avctx)
166 RawVideoContext *context = avctx->priv_data;
168 av_freep(&context->buffer);
172 /* RAW Encoder Implementation */
173 #ifdef CONFIG_RAWVIDEO_ENCODER
174 static int raw_init_encoder(AVCodecContext *avctx)
176 avctx->coded_frame = (AVFrame *)avctx->priv_data;
177 avctx->coded_frame->pict_type = FF_I_TYPE;
178 avctx->coded_frame->key_frame = 1;
179 if(!avctx->codec_tag)
180 avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
184 static int raw_encode(AVCodecContext *avctx,
185 unsigned char *frame, int buf_size, void *data)
187 return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
188 avctx->height, frame, buf_size);
191 AVCodec rawvideo_encoder = {
199 #endif // CONFIG_RAWVIDEO_ENCODER
201 AVCodec rawvideo_decoder = {
205 sizeof(RawVideoContext),