diff ffmpeg/libavcodec/dpxenc.c @ 10:6840f77b83aa

commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavcodec/dpxenc.c	Sun Apr 21 10:55:35 2013 +0200
@@ -0,0 +1,274 @@
+/*
+ * DPX (.dpx) image encoder
+ * Copyright (c) 2011 Peter Ross <[e-mail]>
+ *
+ * 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/common.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/imgutils.h"
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct DPXContext {
+    AVFrame picture;
+    int big_endian;
+    int bits_per_component;
+    int descriptor;
+    int planar;
+} DPXContext;
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+    DPXContext *s = avctx->priv_data;
+
+    avctx->coded_frame = &s->picture;
+    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+    avctx->coded_frame->key_frame = 1;
+
+    s->big_endian         = 1;
+    s->bits_per_component = 8;
+    s->descriptor         = 50; /* RGB */
+    s->planar             = 0;
+
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_RGB24:
+        break;
+    case AV_PIX_FMT_RGBA:
+        s->descriptor = 51; /* RGBA */
+        break;
+    case AV_PIX_FMT_RGB48LE:
+        s->big_endian = 0;
+    case AV_PIX_FMT_RGB48BE:
+        s->bits_per_component = avctx->bits_per_raw_sample ? avctx->bits_per_raw_sample : 16;
+        break;
+    case AV_PIX_FMT_RGBA64LE:
+        s->big_endian = 0;
+    case AV_PIX_FMT_RGBA64BE:
+        s->descriptor = 51;
+        s->bits_per_component = 16;
+        break;
+    case AV_PIX_FMT_GBRP10LE:
+        s->big_endian = 0;
+    case AV_PIX_FMT_GBRP10BE:
+        s->bits_per_component = 10;
+        s->planar = 1;
+        break;
+    case AV_PIX_FMT_GBRP12LE:
+        s->big_endian = 0;
+    case AV_PIX_FMT_GBRP12BE:
+        s->bits_per_component = 12;
+        s->planar = 1;
+        break;
+    default:
+        av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
+        return -1;
+    }
+
+    return 0;
+}
+
+#define write16(p, value) \
+do { \
+    if (s->big_endian) AV_WB16(p, value); \
+    else               AV_WL16(p, value); \
+} while(0)
+
+#define write32(p, value) \
+do { \
+    if (s->big_endian) AV_WB32(p, value); \
+    else               AV_WL32(p, value); \
+} while(0)
+
+static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
+{
+    DPXContext *s = avctx->priv_data;
+    const uint8_t *src = pic->data[0];
+    int x, y;
+
+    for (y = 0; y < avctx->height; y++) {
+        for (x = 0; x < avctx->width; x++) {
+            int value;
+            if (s->big_endian) {
+                value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4)
+                      | ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
+                      | ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
+            } else {
+                value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
+                      | ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
+                      | ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16);
+            }
+            write32(dst, value);
+            dst += 4;
+        }
+        src += pic->linesize[0];
+    }
+}
+
+static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
+{
+    DPXContext *s = avctx->priv_data;
+    const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
+    int x, y, i;
+
+    for (y = 0; y < avctx->height; y++) {
+        for (x = 0; x < avctx->width; x++) {
+            int value;
+            if (s->big_endian) {
+                value = (AV_RB16(src[0] + 2*x) << 12)
+                      | (AV_RB16(src[1] + 2*x) << 2)
+                      | (AV_RB16(src[2] + 2*x) << 22);
+            } else {
+                value = (AV_RL16(src[0] + 2*x) << 12)
+                      | (AV_RL16(src[1] + 2*x) << 2)
+                      | (AV_RL16(src[2] + 2*x) << 22);
+            }
+            write32(dst, value);
+            dst += 4;
+        }
+        for (i = 0; i < 3; i++)
+            src[i] += pic->linesize[i];
+    }
+}
+
+static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst)
+{
+    DPXContext *s = avctx->priv_data;
+    const uint16_t *src[3] = {(uint16_t*)pic->data[0],
+                              (uint16_t*)pic->data[1],
+                              (uint16_t*)pic->data[2]};
+    int x, y, i;
+    for (y = 0; y < avctx->height; y++) {
+        for (x = 0; x < avctx->width; x++) {
+            uint16_t value[3];
+            if (s->big_endian) {
+                value[1] = AV_RB16(src[0] + x) << 4;
+                value[2] = AV_RB16(src[1] + x) << 4;
+                value[0] = AV_RB16(src[2] + x) << 4;
+            } else {
+                value[1] = AV_RL16(src[0] + x) << 4;
+                value[2] = AV_RL16(src[1] + x) << 4;
+                value[0] = AV_RL16(src[2] + x) << 4;
+            }
+            for (i = 0; i < 3; i++)
+                write16(dst++, value[i]);
+        }
+        for (i = 0; i < 3; i++)
+            src[i] += pic->linesize[i]/2;
+    }
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                        const AVFrame *frame, int *got_packet)
+{
+    DPXContext *s = avctx->priv_data;
+    int size, ret;
+    uint8_t *buf;
+
+#define HEADER_SIZE 1664  /* DPX Generic header */
+    if (s->bits_per_component == 10)
+        size = avctx->height * avctx->width * 4;
+    else
+        size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+    if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE)) < 0)
+        return ret;
+    buf = pkt->data;
+
+    memset(buf, 0, HEADER_SIZE);
+
+    /* File information header */
+    write32(buf,       MKBETAG('S','D','P','X'));
+    write32(buf +   4, HEADER_SIZE);
+    memcpy (buf +   8, "V1.0", 4);
+    write32(buf +  20, 1); /* new image */
+    write32(buf +  24, HEADER_SIZE);
+    if (!(avctx->flags & CODEC_FLAG_BITEXACT))
+        memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
+    write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
+
+    /* Image information header */
+    write16(buf + 768, 0); /* orientation; left to right, top to bottom */
+    write16(buf + 770, 1); /* number of elements */
+    write32(buf + 772, avctx->width);
+    write32(buf + 776, avctx->height);
+    buf[800] = s->descriptor;
+    buf[801] = 2; /* linear transfer */
+    buf[802] = 2; /* linear colorimetric */
+    buf[803] = s->bits_per_component;
+    write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
+                       1 : 0); /* packing method */
+    write32(buf + 808, HEADER_SIZE); /* data offset */
+
+    /* Image source information header */
+    write32(buf + 1628, avctx->sample_aspect_ratio.num);
+    write32(buf + 1632, avctx->sample_aspect_ratio.den);
+
+    switch(s->bits_per_component) {
+    case 8:
+    case 16:
+        size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt,
+                                avctx->width, avctx->height,
+                                buf + HEADER_SIZE, pkt->size - HEADER_SIZE);
+        if (size < 0)
+            return size;
+        break;
+    case 10:
+        if (s->planar)
+            encode_gbrp10(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
+        else
+            encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
+        break;
+    case 12:
+        encode_gbrp12(avctx, (const AVPicture*)frame, (uint16_t*)(buf + HEADER_SIZE));
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
+        return -1;
+    }
+
+    size += HEADER_SIZE;
+
+    write32(buf + 16, size); /* file size */
+
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+
+    return 0;
+}
+
+AVCodec ff_dpx_encoder = {
+    .name = "dpx",
+    .type = AVMEDIA_TYPE_VIDEO,
+    .id   = AV_CODEC_ID_DPX,
+    .priv_data_size = sizeof(DPXContext),
+    .init   = encode_init,
+    .encode2 = encode_frame,
+    .pix_fmts = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_RGB24,
+        AV_PIX_FMT_RGBA,
+        AV_PIX_FMT_RGB48LE,
+        AV_PIX_FMT_RGB48BE,
+        AV_PIX_FMT_RGBA64LE,
+        AV_PIX_FMT_RGBA64BE,
+        AV_PIX_FMT_GBRP10LE,
+        AV_PIX_FMT_GBRP10BE,
+        AV_PIX_FMT_GBRP12LE,
+        AV_PIX_FMT_GBRP12BE,
+        AV_PIX_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("DPX image"),
+};