/*
* BMP image format encoder
* Copyright (c) 2006, 2007 Michel Bardiaux
+ * Copyright (c) 2009 Daniel Verkamp <daniel at drv.nu>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "bytestream.h"
#include "bmp.h"
+#include "internal.h"
-static av_cold int bmp_encode_init(AVCodecContext *avctx){
- BMPContext *s = avctx->priv_data;
+static const uint32_t monoblack_pal[] = { 0x000000, 0xFFFFFF };
+static const uint32_t rgb565_masks[] = { 0xF800, 0x07E0, 0x001F };
+static const uint32_t rgb444_masks[] = { 0x0F00, 0x00F0, 0x000F };
- avcodec_get_frame_defaults((AVFrame*)&s->picture);
- avctx->coded_frame = (AVFrame*)&s->picture;
+static av_cold int bmp_encode_init(AVCodecContext *avctx){
+ switch (avctx->pix_fmt) {
+ case AV_PIX_FMT_BGR24:
+ avctx->bits_per_coded_sample = 24;
+ break;
+ case AV_PIX_FMT_RGB555:
+ case AV_PIX_FMT_RGB565:
+ case AV_PIX_FMT_RGB444:
+ avctx->bits_per_coded_sample = 16;
+ break;
+ case AV_PIX_FMT_RGB8:
+ case AV_PIX_FMT_BGR8:
+ case AV_PIX_FMT_RGB4_BYTE:
+ case AV_PIX_FMT_BGR4_BYTE:
+ case AV_PIX_FMT_GRAY8:
+ case AV_PIX_FMT_PAL8:
+ avctx->bits_per_coded_sample = 8;
+ break;
+ case AV_PIX_FMT_MONOBLACK:
+ avctx->bits_per_coded_sample = 1;
+ break;
+ default:
+ av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
+ return -1;
+ }
return 0;
}
-static int bmp_encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
- BMPContext *s = avctx->priv_data;
- AVFrame *pict = data;
- AVFrame * const p= (AVFrame*)&s->picture;
- int n_bytes_image, n_bytes_per_row, n_bytes, i, n, hsize;
- uint8_t *ptr;
- unsigned char* buf0 = buf;
- *p = *pict;
- p->pict_type= FF_I_TYPE;
- p->key_frame= 1;
- n_bytes_per_row = (avctx->width*3 + 3) & ~3;
- n_bytes_image = avctx->height*n_bytes_per_row;
+static int bmp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *pict, int *got_packet)
+{
+ const AVFrame * const p = pict;
+ int n_bytes_image, n_bytes_per_row, n_bytes, i, n, hsize, ret;
+ const uint32_t *pal = NULL;
+ int pad_bytes_per_row, pal_entries = 0, compression = BMP_RGB;
+ int bit_count = avctx->bits_per_coded_sample;
+ uint8_t *ptr, *buf;
+
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+ avctx->coded_frame->key_frame = 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ switch (avctx->pix_fmt) {
+ case AV_PIX_FMT_RGB444:
+ compression = BMP_BITFIELDS;
+ pal = rgb444_masks; // abuse pal to hold color masks
+ pal_entries = 3;
+ break;
+ case AV_PIX_FMT_RGB565:
+ compression = BMP_BITFIELDS;
+ pal = rgb565_masks; // abuse pal to hold color masks
+ pal_entries = 3;
+ break;
+ case AV_PIX_FMT_RGB8:
+ case AV_PIX_FMT_BGR8:
+ case AV_PIX_FMT_RGB4_BYTE:
+ case AV_PIX_FMT_BGR4_BYTE:
+ case AV_PIX_FMT_GRAY8:
+ avpriv_set_systematic_pal2((uint32_t*)p->data[1], avctx->pix_fmt);
+ case AV_PIX_FMT_PAL8:
+ pal = (uint32_t *)p->data[1];
+ break;
+ case AV_PIX_FMT_MONOBLACK:
+ pal = monoblack_pal;
+ break;
+ }
+ if (pal && !pal_entries) pal_entries = 1 << bit_count;
+ n_bytes_per_row = ((int64_t)avctx->width * (int64_t)bit_count + 7LL) >> 3LL;
+ pad_bytes_per_row = (4 - n_bytes_per_row) & 3;
+ n_bytes_image = avctx->height * (n_bytes_per_row + pad_bytes_per_row);
// STRUCTURE.field refer to the MSVC documentation for BITMAPFILEHEADER
// and related pages.
#define SIZE_BITMAPFILEHEADER 14
#define SIZE_BITMAPINFOHEADER 40
- hsize = SIZE_BITMAPFILEHEADER + SIZE_BITMAPINFOHEADER;
+ hsize = SIZE_BITMAPFILEHEADER + SIZE_BITMAPINFOHEADER + (pal_entries << 2);
n_bytes = n_bytes_image + hsize;
- if(n_bytes>buf_size) {
- av_log(avctx, AV_LOG_ERROR, "buf size too small (need %d, got %d)\n", n_bytes, buf_size);
- return -1;
+ if ((ret = ff_alloc_packet(pkt, n_bytes)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+ return ret;
}
+ buf = pkt->data;
bytestream_put_byte(&buf, 'B'); // BITMAPFILEHEADER.bfType
bytestream_put_byte(&buf, 'M'); // do.
bytestream_put_le32(&buf, n_bytes); // BITMAPFILEHEADER.bfSize
bytestream_put_le32(&buf, avctx->width); // BITMAPINFOHEADER.biWidth
bytestream_put_le32(&buf, avctx->height); // BITMAPINFOHEADER.biHeight
bytestream_put_le16(&buf, 1); // BITMAPINFOHEADER.biPlanes
- bytestream_put_le16(&buf, 24); // BITMAPINFOHEADER.biBitCount
- bytestream_put_le32(&buf, BMP_RGB); // BITMAPINFOHEADER.biCompression
+ bytestream_put_le16(&buf, bit_count); // BITMAPINFOHEADER.biBitCount
+ bytestream_put_le32(&buf, compression); // BITMAPINFOHEADER.biCompression
bytestream_put_le32(&buf, n_bytes_image); // BITMAPINFOHEADER.biSizeImage
bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biXPelsPerMeter
bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biYPelsPerMeter
bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biClrUsed
bytestream_put_le32(&buf, 0); // BITMAPINFOHEADER.biClrImportant
+ for (i = 0; i < pal_entries; i++)
+ bytestream_put_le32(&buf, pal[i] & 0xFFFFFF);
// BMP files are bottom-to-top so we start from the end...
ptr = p->data[0] + (avctx->height - 1) * p->linesize[0];
- buf = buf0 + hsize;
+ buf = pkt->data + hsize;
for(i = 0; i < avctx->height; i++) {
- n = 3*avctx->width;
- memcpy(buf, ptr, n);
- buf += n;
- memset(buf, 0, n_bytes_per_row-n);
- buf += n_bytes_per_row-n;
+ if (bit_count == 16) {
+ const uint16_t *src = (const uint16_t *) ptr;
+ uint16_t *dst = (uint16_t *) buf;
+ for(n = 0; n < avctx->width; n++)
+ AV_WL16(dst + n, src[n]);
+ } else {
+ memcpy(buf, ptr, n_bytes_per_row);
+ }
+ buf += n_bytes_per_row;
+ memset(buf, 0, pad_bytes_per_row);
+ buf += pad_bytes_per_row;
ptr -= p->linesize[0]; // ... and go back
}
- return n_bytes;
+
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ *got_packet = 1;
+ return 0;
}
-AVCodec bmp_encoder = {
- "bmp",
- CODEC_TYPE_VIDEO,
- CODEC_ID_BMP,
- sizeof(BMPContext),
- bmp_encode_init,
- bmp_encode_frame,
- NULL, //encode_end,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("BMP image"),
+AVCodec ff_bmp_encoder = {
+ .name = "bmp",
+ .long_name = NULL_IF_CONFIG_SMALL("BMP (Windows and OS/2 bitmap)"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_BMP,
+ .init = bmp_encode_init,
+ .encode2 = bmp_encode_frame,
+ .pix_fmts = (const enum AVPixelFormat[]){
+ AV_PIX_FMT_BGR24,
+ AV_PIX_FMT_RGB555, AV_PIX_FMT_RGB444, AV_PIX_FMT_RGB565,
+ 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,
+ AV_PIX_FMT_MONOBLACK,
+ AV_PIX_FMT_NONE
+ },
};
projects / ffmpeg / blobdiff