summaryrefslogtreecommitdiff
path: root/ffmpeg1/libavcodec/dpx.c
diff options
context:
space:
mode:
Diffstat (limited to 'ffmpeg1/libavcodec/dpx.c')
-rw-r--r--ffmpeg1/libavcodec/dpx.c266
1 files changed, 0 insertions, 266 deletions
diff --git a/ffmpeg1/libavcodec/dpx.c b/ffmpeg1/libavcodec/dpx.c
deleted file mode 100644
index 0d60a7e..0000000
--- a/ffmpeg1/libavcodec/dpx.c
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * DPX (.dpx) image decoder
- * Copyright (c) 2009 Jimmy Christensen
- *
- * 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/intreadwrite.h"
-#include "libavutil/imgutils.h"
-#include "bytestream.h"
-#include "avcodec.h"
-#include "internal.h"
-
-static unsigned int read32(const uint8_t **ptr, int is_big)
-{
- unsigned int temp;
- if (is_big) {
- temp = AV_RB32(*ptr);
- } else {
- temp = AV_RL32(*ptr);
- }
- *ptr += 4;
- return temp;
-}
-
-static uint16_t read10in32(const uint8_t **ptr, uint32_t * lbuf,
- int * n_datum, int is_big)
-{
- if (*n_datum)
- (*n_datum)--;
- else {
- *lbuf = read32(ptr, is_big);
- *n_datum = 2;
- }
-
- *lbuf = (*lbuf << 10) | (*lbuf >> 22);
-
- return *lbuf & 0x3FF;
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data,
- int *got_frame,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- AVFrame *const p = data;
- uint8_t *ptr[AV_NUM_DATA_POINTERS];
-
- unsigned int offset;
- int magic_num, endian;
- int x, y, i, ret;
- int w, h, bits_per_color, descriptor, elements, packing, total_size;
-
- unsigned int rgbBuffer = 0;
- int n_datum = 0;
-
- if (avpkt->size <= 1634) {
- av_log(avctx, AV_LOG_ERROR, "Packet too small for DPX header\n");
- return AVERROR_INVALIDDATA;
- }
-
- magic_num = AV_RB32(buf);
- buf += 4;
-
- /* Check if the files "magic number" is "SDPX" which means it uses
- * big-endian or XPDS which is for little-endian files */
- if (magic_num == AV_RL32("SDPX")) {
- endian = 0;
- } else if (magic_num == AV_RB32("SDPX")) {
- endian = 1;
- } else {
- av_log(avctx, AV_LOG_ERROR, "DPX marker not found\n");
- return AVERROR_INVALIDDATA;
- }
-
- offset = read32(&buf, endian);
- if (avpkt->size <= offset) {
- av_log(avctx, AV_LOG_ERROR, "Invalid data start offset\n");
- return AVERROR_INVALIDDATA;
- }
- // Need to end in 0x304 offset from start of file
- buf = avpkt->data + 0x304;
- w = read32(&buf, endian);
- h = read32(&buf, endian);
- if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
- return ret;
-
- if (w != avctx->width || h != avctx->height)
- avcodec_set_dimensions(avctx, w, h);
-
- // Need to end in 0x320 to read the descriptor
- buf += 20;
- descriptor = buf[0];
-
- // Need to end in 0x323 to read the bits per color
- buf += 3;
- avctx->bits_per_raw_sample =
- bits_per_color = buf[0];
- buf++;
- packing = *((uint16_t*)buf);
-
- buf += 824;
- avctx->sample_aspect_ratio.num = read32(&buf, endian);
- avctx->sample_aspect_ratio.den = read32(&buf, endian);
- if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0)
- av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
- avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den,
- 0x10000);
- else
- avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
-
- switch (descriptor) {
- case 51: // RGBA
- elements = 4;
- break;
- case 50: // RGB
- elements = 3;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unsupported descriptor %d\n", descriptor);
- return AVERROR_INVALIDDATA;
- }
-
- switch (bits_per_color) {
- case 8:
- if (elements == 4) {
- avctx->pix_fmt = AV_PIX_FMT_RGBA;
- } else {
- avctx->pix_fmt = AV_PIX_FMT_RGB24;
- }
- total_size = avctx->width * avctx->height * elements;
- break;
- case 10:
- if (!packing) {
- av_log(avctx, AV_LOG_ERROR, "Packing to 32bit required\n");
- return -1;
- }
- avctx->pix_fmt = AV_PIX_FMT_GBRP10;
- total_size = (avctx->width * avctx->height * elements + 2) / 3 * 4;
- break;
- case 12:
- if (!packing) {
- av_log(avctx, AV_LOG_ERROR, "Packing to 16bit required\n");
- return -1;
- }
- if (endian) {
- avctx->pix_fmt = AV_PIX_FMT_GBRP12BE;
- } else {
- avctx->pix_fmt = AV_PIX_FMT_GBRP12LE;
- }
- total_size = 2 * avctx->width * avctx->height * elements;
- break;
- case 16:
- if (endian) {
- avctx->pix_fmt = elements == 4 ? AV_PIX_FMT_RGBA64BE : AV_PIX_FMT_RGB48BE;
- } else {
- avctx->pix_fmt = elements == 4 ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGB48LE;
- }
- total_size = 2 * avctx->width * avctx->height * elements;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unsupported color depth : %d\n", bits_per_color);
- return AVERROR_INVALIDDATA;
- }
-
- if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
- return ret;
-
- // Move pointer to offset from start of file
- buf = avpkt->data + offset;
-
- for (i=0; i<AV_NUM_DATA_POINTERS; i++)
- ptr[i] = p->data[i];
-
- if (total_size + (int64_t)offset > avpkt->size) {
- av_log(avctx, AV_LOG_ERROR, "Overread buffer. Invalid header?\n");
- return AVERROR_INVALIDDATA;
- }
- switch (bits_per_color) {
- case 10:
- for (x = 0; x < avctx->height; x++) {
- uint16_t *dst[3] = {(uint16_t*)ptr[0],
- (uint16_t*)ptr[1],
- (uint16_t*)ptr[2]};
- for (y = 0; y < avctx->width; y++) {
- *dst[2]++ = read10in32(&buf, &rgbBuffer,
- &n_datum, endian);
- *dst[0]++ = read10in32(&buf, &rgbBuffer,
- &n_datum, endian);
- *dst[1]++ = read10in32(&buf, &rgbBuffer,
- &n_datum, endian);
- // For 10 bit, ignore alpha
- if (elements == 4)
- read10in32(&buf, &rgbBuffer,
- &n_datum, endian);
- }
- for (i = 0; i < 3; i++)
- ptr[i] += p->linesize[i];
- }
- break;
- case 12:
- for (x = 0; x < avctx->height; x++) {
- uint16_t *dst[3] = {(uint16_t*)ptr[0],
- (uint16_t*)ptr[1],
- (uint16_t*)ptr[2]};
- for (y = 0; y < avctx->width; y++) {
- *dst[2] = *((uint16_t*)buf);
- *dst[2] = (*dst[2] >> 4) | (*dst[2] << 12);
- dst[2]++;
- buf += 2;
- *dst[0] = *((uint16_t*)buf);
- *dst[0] = (*dst[0] >> 4) | (*dst[0] << 12);
- dst[0]++;
- buf += 2;
- *dst[1] = *((uint16_t*)buf);
- *dst[1] = (*dst[1] >> 4) | (*dst[1] << 12);
- dst[1]++;
- buf += 2;
- // For 12 bit, ignore alpha
- if (elements == 4)
- buf += 2;
- }
- for (i = 0; i < 3; i++)
- ptr[i] += p->linesize[i];
- }
- break;
- case 16:
- elements *= 2;
- case 8:
- for (x = 0; x < avctx->height; x++) {
- memcpy(ptr[0], buf, elements*avctx->width);
- ptr[0] += p->linesize[0];
- buf += elements*avctx->width;
- }
- break;
- }
-
- *got_frame = 1;
-
- return buf_size;
-}
-
-AVCodec ff_dpx_decoder = {
- .name = "dpx",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_DPX,
- .decode = decode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("DPX image"),
- .capabilities = CODEC_CAP_DR1,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 14:22:37 +0000