aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavcodec / bmpenc.c
blob915c3968a7732ba563fd3cd4dc8c24ba41b51ff6
1 /*
2 * BMP image format encoder
3 * Copyright (c) 2006, 2007 Michel Bardiaux
4 * Copyright (c) 2009 Daniel Verkamp <daniel at drv.nu>
6 * This file is part of Libav.
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/imgutils.h"
24 #include "avcodec.h"
25 #include "bytestream.h"
26 #include "bmp.h"
27 #include "internal.h"
29 static const uint32_t monoblack_pal[] = { 0x000000, 0xFFFFFF };
30 static const uint32_t rgb565_masks[] = { 0xF800, 0x07E0, 0x001F };
31 static const uint32_t rgb444_masks[] = { 0x0F00, 0x00F0, 0x000F };
33 static av_cold int bmp_encode_init(AVCodecContext *avctx){
34 switch (avctx->pix_fmt) {
35 case AV_PIX_FMT_BGR24:
36 avctx->bits_per_coded_sample = 24;
37 break;
38 case AV_PIX_FMT_RGB555:
39 case AV_PIX_FMT_RGB565:
40 case AV_PIX_FMT_RGB444:
41 avctx->bits_per_coded_sample = 16;
42 break;
43 case AV_PIX_FMT_RGB8:
44 case AV_PIX_FMT_BGR8:
45 case AV_PIX_FMT_RGB4_BYTE:
46 case AV_PIX_FMT_BGR4_BYTE:
47 case AV_PIX_FMT_GRAY8:
48 case AV_PIX_FMT_PAL8:
49 avctx->bits_per_coded_sample = 8;
50 break;
51 case AV_PIX_FMT_MONOBLACK:
52 avctx->bits_per_coded_sample = 1;
53 break;
54 default:
55 av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
56 return -1;
59 return 0;
62 static int bmp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
63 const AVFrame *pict, int *got_packet)
65 const AVFrame * const p = pict;
66 int n_bytes_image, n_bytes_per_row, n_bytes, i, n, hsize, ret;
67 const uint32_t *pal = NULL;
68 int pad_bytes_per_row, pal_entries = 0, compression = BMP_RGB;
69 int bit_count = avctx->bits_per_coded_sample;
70 uint8_t *ptr, *buf;
72 #if FF_API_CODED_FRAME
73 FF_DISABLE_DEPRECATION_WARNINGS
74 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
75 avctx->coded_frame->key_frame = 1;
76 FF_ENABLE_DEPRECATION_WARNINGS
77 #endif
78 switch (avctx->pix_fmt) {
79 case AV_PIX_FMT_RGB444:
80 compression = BMP_BITFIELDS;
81 pal = rgb444_masks; // abuse pal to hold color masks
82 pal_entries = 3;
83 break;
84 case AV_PIX_FMT_RGB565:
85 compression = BMP_BITFIELDS;
86 pal = rgb565_masks; // abuse pal to hold color masks
87 pal_entries = 3;
88 break;
89 case AV_PIX_FMT_RGB8:
90 case AV_PIX_FMT_BGR8:
91 case AV_PIX_FMT_RGB4_BYTE:
92 case AV_PIX_FMT_BGR4_BYTE:
93 case AV_PIX_FMT_GRAY8:
94 avpriv_set_systematic_pal2((uint32_t*)p->data[1], avctx->pix_fmt);
95 case AV_PIX_FMT_PAL8:
96 pal = (uint32_t *)p->data[1];
97 break;
98 case AV_PIX_FMT_MONOBLACK:
99 pal = monoblack_pal;
100 break;
102 if (pal && !pal_entries) pal_entries = 1 << bit_count;
103 n_bytes_per_row = ((int64_t)avctx->width * (int64_t)bit_count + 7LL) >> 3LL;
104 pad_bytes_per_row = (4 - n_bytes_per_row) & 3;
105 n_bytes_image = avctx->height * (n_bytes_per_row + pad_bytes_per_row);
107 // STRUCTURE.field refer to the MSVC documentation for BITMAPFILEHEADER
108 // and related pages.
109 #define SIZE_BITMAPFILEHEADER 14
110 #define SIZE_BITMAPINFOHEADER 40
111 hsize = SIZE_BITMAPFILEHEADER + SIZE_BITMAPINFOHEADER + (pal_entries << 2);
112 n_bytes = n_bytes_image + hsize;
113 if ((ret = ff_alloc_packet(pkt, n_bytes)) < 0) {
114 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
115 return ret;
117 buf = pkt->data;
118 bytestream_put_byte(&buf, 'B'); // BITMAPFILEHEADER.bfType
119 bytestream_put_byte(&buf, 'M'); // do.
120 bytestream_put_le32(&buf, n_bytes); // BITMAPFILEHEADER.bfSize
121 bytestream_put_le16(&buf, 0); // BITMAPFILEHEADER.bfReserved1
122 bytestream_put_le16(&buf, 0); // BITMAPFILEHEADER.bfReserved2
123 bytestream_put_le32(&buf, hsize); // BITMAPFILEHEADER.bfOffBits
124 bytestream_put_le32(&buf, SIZE_BITMAPINFOHEADER); // BITMAPINFOHEADER.biSize
125 bytestream_put_le32(&buf, avctx->width); // BITMAPINFOHEADER.biWidth
126 bytestream_put_le32(&buf, avctx->height); // BITMAPINFOHEADER.biHeight
127 bytestream_put_le16(&buf, 1); // BITMAPINFOHEADER.biPlanes
128 bytestream_put_le16(&buf, bit_count); // BITMAPINFOHEADER.biBitCount
129 bytestream_put_le32(&buf, compression); // BITMAPINFOHEADER.biCompression
130 bytestream_put_le32(&buf, n_bytes_image); // BITMAPINFOHEADER.biSizeImage
131 bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biXPelsPerMeter
132 bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biYPelsPerMeter
133 bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biClrUsed
134 bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biClrImportant
135 for (i = 0; i < pal_entries; i++)
136 bytestream_put_le32(&buf, pal[i] & 0xFFFFFF);
137 // BMP files are bottom-to-top so we start from the end...
138 ptr = p->data[0] + (avctx->height - 1) * p->linesize[0];
139 buf = pkt->data + hsize;
140 for(i = 0; i < avctx->height; i++) {
141 if (bit_count == 16) {
142 const uint16_t *src = (const uint16_t *) ptr;
143 uint16_t *dst = (uint16_t *) buf;
144 for(n = 0; n < avctx->width; n++)
145 AV_WL16(dst + n, src[n]);
146 } else {
147 memcpy(buf, ptr, n_bytes_per_row);
149 buf += n_bytes_per_row;
150 memset(buf, 0, pad_bytes_per_row);
151 buf += pad_bytes_per_row;
152 ptr -= p->linesize[0]; // ... and go back
155 pkt->flags |= AV_PKT_FLAG_KEY;
156 *got_packet = 1;
157 return 0;
160 AVCodec ff_bmp_encoder = {
161 .name = "bmp",
162 .long_name = NULL_IF_CONFIG_SMALL("BMP (Windows and OS/2 bitmap)"),
163 .type = AVMEDIA_TYPE_VIDEO,
164 .id = AV_CODEC_ID_BMP,
165 .init = bmp_encode_init,
166 .encode2 = bmp_encode_frame,
167 .pix_fmts = (const enum AVPixelFormat[]){
168 AV_PIX_FMT_BGR24,
169 AV_PIX_FMT_RGB555, AV_PIX_FMT_RGB444, AV_PIX_FMT_RGB565,
170 AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8, AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE, AV_PIX_FMT_GRAY8, AV_PIX_FMT_PAL8,
171 AV_PIX_FMT_MONOBLACK,
172 AV_PIX_FMT_NONE