adding ffmpeg specific version

1 files changed, 183 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/bmpenc.c b/ffmpeg1/libavcodec/bmpenc.c
new file mode 100644
index 0000000..bda6799
--- /dev/null
+++ b/ffmpeg1/libavcodec/bmpenc.c
@@ -0,0 +1,183 @@
+/*
+ * 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.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/imgutils.h"
+#include "libavutil/avassert.h"
+#include "avcodec.h"
+#include "bytestream.h"
+#include "bmp.h"
+#include "internal.h"
+
+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 };
+
+static av_cold int bmp_encode_init(AVCodecContext *avctx){
+    BMPContext *s = avctx->priv_data;
+
+    avcodec_get_frame_defaults(&s->picture);
+    avctx->coded_frame = &s->picture;
+
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_BGRA:
+        avctx->bits_per_coded_sample = 32;
+        break;
+    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, AVPacket *pkt,
+                            const AVFrame *pict, int *got_packet)
+{
+    BMPContext *s = avctx->priv_data;
+    AVFrame * const p = &s->picture;
+    int n_bytes_image, n_bytes_per_row, n_bytes, i, n, hsize, ret;
+    const uint32_t *pal = NULL;
+    uint32_t palette256[256];
+    int pad_bytes_per_row, pal_entries = 0, compression = BMP_RGB;
+    int bit_count = avctx->bits_per_coded_sample;
+    uint8_t *ptr, *buf;
+    *p = *pict;
+    p->pict_type= AV_PICTURE_TYPE_I;
+    p->key_frame= 1;
+    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:
+        av_assert1(bit_count == 8);
+        avpriv_set_systematic_pal2(palette256, avctx->pix_fmt);
+        pal = palette256;
+        break;
+    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 + (pal_entries << 2);
+    n_bytes = n_bytes_image + hsize;
+    if ((ret = ff_alloc_packet2(avctx, pkt, n_bytes)) < 0)
+        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_le16(&buf, 0);                     // BITMAPFILEHEADER.bfReserved1
+    bytestream_put_le16(&buf, 0);                     // BITMAPFILEHEADER.bfReserved2
+    bytestream_put_le32(&buf, hsize);                 // BITMAPFILEHEADER.bfOffBits
+    bytestream_put_le32(&buf, SIZE_BITMAPINFOHEADER); // BITMAPINFOHEADER.biSize
+    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, 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 = pkt->data + hsize;
+    for(i = 0; i < avctx->height; i++) {
+        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
+    }
+
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+    return 0;
+}
+
+AVCodec ff_bmp_encoder = {
+    .name           = "bmp",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_BMP,
+    .priv_data_size = sizeof(BMPContext),
+    .init           = bmp_encode_init,
+    .encode2        = bmp_encode_frame,
+    .pix_fmts       = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR24,
+        AV_PIX_FMT_RGB565, AV_PIX_FMT_RGB555, AV_PIX_FMT_RGB444,
+        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
+    },
+    .long_name      = NULL_IF_CONFIG_SMALL("BMP (Windows and OS/2 bitmap)"),
+};