| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Radiance HDR image format | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "libavutil/mem.h" | ||
| 22 | #include "avcodec.h" | ||
| 23 | #include "bytestream.h" | ||
| 24 | #include "codec_internal.h" | ||
| 25 | #include "encode.h" | ||
| 26 | |||
| 27 | typedef struct HDREncContext { | ||
| 28 | uint8_t *scanline; | ||
| 29 | } HDREncContext; | ||
| 30 | |||
| 31 | ✗ | static av_cold int hdr_encode_init(AVCodecContext *avctx) | |
| 32 | { | ||
| 33 | ✗ | HDREncContext *s = avctx->priv_data; | |
| 34 | |||
| 35 | ✗ | s->scanline = av_calloc(avctx->width * 4, sizeof(*s->scanline)); | |
| 36 | ✗ | if (!s->scanline) | |
| 37 | ✗ | return AVERROR(ENOMEM); | |
| 38 | |||
| 39 | ✗ | return 0; | |
| 40 | } | ||
| 41 | |||
| 42 | ✗ | static av_cold int hdr_encode_close(AVCodecContext *avctx) | |
| 43 | { | ||
| 44 | ✗ | HDREncContext *s = avctx->priv_data; | |
| 45 | |||
| 46 | ✗ | av_freep(&s->scanline); | |
| 47 | |||
| 48 | ✗ | return 0; | |
| 49 | } | ||
| 50 | |||
| 51 | ✗ | static void bytestream_put_str(uint8_t **buf, const char *const line) | |
| 52 | { | ||
| 53 | ✗ | bytestream_put_buffer(buf, line, strlen(line)); | |
| 54 | ✗ | } | |
| 55 | |||
| 56 | ✗ | static void float2rgbe(uint8_t *rgbe, float red, float green, float blue) | |
| 57 | { | ||
| 58 | float v; | ||
| 59 | int e; | ||
| 60 | |||
| 61 | ✗ | v = FFMAX3(red, green, blue); | |
| 62 | |||
| 63 | ✗ | if (v < 1e-32f) { | |
| 64 | ✗ | rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; | |
| 65 | } else { | ||
| 66 | ✗ | v = frexpf(v, &e) * 256.f / v; | |
| 67 | |||
| 68 | ✗ | rgbe[0] = av_clip_uint8(red * v); | |
| 69 | ✗ | rgbe[1] = av_clip_uint8(green * v); | |
| 70 | ✗ | rgbe[2] = av_clip_uint8(blue * v); | |
| 71 | ✗ | rgbe[3] = av_clip_uint8(e + 128); | |
| 72 | } | ||
| 73 | ✗ | } | |
| 74 | |||
| 75 | ✗ | static void rle(uint8_t **buffer, const uint8_t *data, int width) | |
| 76 | { | ||
| 77 | #define MIN_RLE 4 | ||
| 78 | ✗ | int cur = 0; | |
| 79 | |||
| 80 | ✗ | while (cur < width) { | |
| 81 | ✗ | int run_count = 0, old_run_count = 0; | |
| 82 | ✗ | int beg_run = cur; | |
| 83 | uint8_t buf[2]; | ||
| 84 | |||
| 85 | ✗ | while (run_count < MIN_RLE && beg_run < width) { | |
| 86 | ✗ | beg_run += run_count; | |
| 87 | ✗ | old_run_count = run_count; | |
| 88 | ✗ | run_count = 1; | |
| 89 | ✗ | while ((beg_run + run_count < width) && (run_count < 127) && | |
| 90 | ✗ | (data[beg_run * 4] == data[(beg_run + run_count) * 4])) | |
| 91 | ✗ | run_count++; | |
| 92 | } | ||
| 93 | |||
| 94 | ✗ | if ((old_run_count > 1) && (old_run_count == beg_run - cur)) { | |
| 95 | ✗ | buf[0] = 128 + old_run_count; | |
| 96 | ✗ | buf[1] = data[cur * 4]; | |
| 97 | ✗ | bytestream_put_buffer(buffer, buf, sizeof(buf)); | |
| 98 | ✗ | cur = beg_run; | |
| 99 | } | ||
| 100 | |||
| 101 | ✗ | while (cur < beg_run) { | |
| 102 | ✗ | int nonrun_count = FFMIN(128, beg_run - cur); | |
| 103 | ✗ | buf[0] = nonrun_count; | |
| 104 | ✗ | bytestream_put_byte(buffer, buf[0]); | |
| 105 | ✗ | for (int n = 0; n < nonrun_count; n++) | |
| 106 | ✗ | bytestream_put_byte(buffer, data[(cur + n) * 4]); | |
| 107 | ✗ | cur += nonrun_count; | |
| 108 | } | ||
| 109 | |||
| 110 | ✗ | if (run_count >= MIN_RLE) { | |
| 111 | ✗ | buf[0] = 128 + run_count; | |
| 112 | ✗ | buf[1] = data[beg_run * 4]; | |
| 113 | ✗ | bytestream_put_buffer(buffer, buf, sizeof(buf)); | |
| 114 | ✗ | cur += run_count; | |
| 115 | } | ||
| 116 | } | ||
| 117 | ✗ | } | |
| 118 | |||
| 119 | ✗ | static int hdr_encode_frame(AVCodecContext *avctx, AVPacket *pkt, | |
| 120 | const AVFrame *frame, int *got_packet) | ||
| 121 | { | ||
| 122 | ✗ | HDREncContext *s = avctx->priv_data; | |
| 123 | int64_t packet_size; | ||
| 124 | uint8_t *buf; | ||
| 125 | int ret; | ||
| 126 | |||
| 127 | ✗ | packet_size = avctx->width * avctx->height * 4LL + 1024LL; | |
| 128 | ✗ | if ((ret = ff_get_encode_buffer(avctx, pkt, packet_size, 0)) < 0) | |
| 129 | ✗ | return ret; | |
| 130 | |||
| 131 | ✗ | buf = pkt->data; | |
| 132 | ✗ | bytestream_put_str(&buf, "#?RADIANCE\n"); | |
| 133 | ✗ | bytestream_put_str(&buf, "SOFTWARE=lavc\n"); | |
| 134 | ✗ | ret = snprintf(buf, 32, "PIXASPECT=%f\n", av_q2d(av_inv_q(avctx->sample_aspect_ratio))); | |
| 135 | ✗ | if (ret > 0) | |
| 136 | ✗ | buf += ret; | |
| 137 | ✗ | bytestream_put_str(&buf, "FORMAT=32-bit_rle_rgbe\n\n"); | |
| 138 | ✗ | ret = snprintf(buf, 32, "-Y %d +X %d\n", avctx->height, avctx->width); | |
| 139 | ✗ | if (ret > 0) | |
| 140 | ✗ | buf += ret; | |
| 141 | |||
| 142 | ✗ | for (int y = 0; y < avctx->height; y++) { | |
| 143 | ✗ | const float *red = (const float *)(frame->data[2] + y * frame->linesize[2]); | |
| 144 | ✗ | const float *green = (const float *)(frame->data[0] + y * frame->linesize[0]); | |
| 145 | ✗ | const float *blue = (const float *)(frame->data[1] + y * frame->linesize[1]); | |
| 146 | |||
| 147 | ✗ | if (avctx->width < 8 || avctx->width > 0x7fff) { | |
| 148 | ✗ | for (int x = 0; x < avctx->width; x++) { | |
| 149 | ✗ | float2rgbe(buf, red[x], green[x], blue[x]); | |
| 150 | ✗ | buf += 4; | |
| 151 | } | ||
| 152 | } else { | ||
| 153 | ✗ | bytestream_put_byte(&buf, 2); | |
| 154 | ✗ | bytestream_put_byte(&buf, 2); | |
| 155 | ✗ | bytestream_put_byte(&buf, avctx->width >> 8); | |
| 156 | ✗ | bytestream_put_byte(&buf, avctx->width & 0xFF); | |
| 157 | |||
| 158 | ✗ | for (int x = 0; x < avctx->width; x++) | |
| 159 | ✗ | float2rgbe(s->scanline + 4 * x, red[x], green[x], blue[x]); | |
| 160 | ✗ | for (int p = 0; p < 4; p++) | |
| 161 | ✗ | rle(&buf, s->scanline + p, avctx->width); | |
| 162 | } | ||
| 163 | } | ||
| 164 | |||
| 165 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 166 | |||
| 167 | ✗ | av_shrink_packet(pkt, buf - pkt->data); | |
| 168 | |||
| 169 | ✗ | *got_packet = 1; | |
| 170 | |||
| 171 | ✗ | return 0; | |
| 172 | } | ||
| 173 | |||
| 174 | const FFCodec ff_hdr_encoder = { | ||
| 175 | .p.name = "hdr", | ||
| 176 | CODEC_LONG_NAME("HDR (Radiance RGBE format) image"), | ||
| 177 | .priv_data_size = sizeof(HDREncContext), | ||
| 178 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 179 | .p.id = AV_CODEC_ID_RADIANCE_HDR, | ||
| 180 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | | ||
| 181 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, | ||
| 182 | .init = hdr_encode_init, | ||
| 183 | FF_CODEC_ENCODE_CB(hdr_encode_frame), | ||
| 184 | .close = hdr_encode_close, | ||
| 185 | .p.pix_fmts = (const enum AVPixelFormat[]){ | ||
| 186 | AV_PIX_FMT_GBRPF32, | ||
| 187 | AV_PIX_FMT_NONE | ||
| 188 | }, | ||
| 189 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 190 | }; | ||
| 191 |