* DPX (.dpx) image decoder
* Copyright (c) 2009 Jimmy Christensen
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * 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/intfloat.h"
#include "libavutil/imgutils.h"
#include "bytestream.h"
#include "avcodec.h"
#include "internal.h"
+static unsigned int read16(const uint8_t **ptr, int is_big)
+{
+ unsigned int temp;
+ if (is_big) {
+ temp = AV_RB16(*ptr);
+ } else {
+ temp = AV_RL16(*ptr);
+ }
+ *ptr += 2;
+ return temp;
+}
+
static unsigned int read32(const uint8_t **ptr, int is_big)
{
unsigned int temp;
return temp;
}
-static inline unsigned make_16bit(unsigned value)
+static uint16_t read10in32(const uint8_t **ptr, uint32_t * lbuf,
+ int * n_datum, int is_big)
{
- // mask away invalid bits
- value &= 0xFFC0;
- // correctly expand to 16 bits
- return value + (value >> 10);
+ 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,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
- const uint8_t *buf_end = avpkt->data + avpkt->size;
int buf_size = avpkt->size;
AVFrame *const p = data;
- uint8_t *ptr;
+ uint8_t *ptr[AV_NUM_DATA_POINTERS];
unsigned int offset;
int magic_num, endian;
- int x, y, ret;
- int w, h, stride, bits_per_color, descriptor, elements, target_packet_size, source_packet_size;
+ int x, y, stride, i, ret;
+ int w, h, bits_per_color, descriptor, elements, packing;
+ int encoding, need_align = 0;
- unsigned int rgbBuffer;
+ 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");
av_log(avctx, AV_LOG_ERROR, "Invalid data start offset\n");
return AVERROR_INVALIDDATA;
}
+
+ // Check encryption
+ buf = avpkt->data + 660;
+ ret = read32(&buf, endian);
+ if (ret != 0xFFFFFFFF) {
+ avpriv_report_missing_feature(avctx, "Encryption");
+ av_log(avctx, AV_LOG_WARNING, "The image is encrypted and may "
+ "not properly decode.\n");
+ }
+
// Need to end in 0x304 offset from start of file
buf = avpkt->data + 0x304;
w = read32(&buf, endian);
h = read32(&buf, endian);
+ if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
+ return ret;
+
// Need to end in 0x320 to read the descriptor
buf += 20;
descriptor = buf[0];
buf += 3;
avctx->bits_per_raw_sample =
bits_per_color = buf[0];
+ buf++;
+ packing = read16(&buf, endian);
+ encoding = read16(&buf, endian);
+
+ if (packing > 1) {
+ avpriv_report_missing_feature(avctx, "Packing %d", packing);
+ return AVERROR_PATCHWELCOME;
+ }
+ if (encoding) {
+ avpriv_report_missing_feature(avctx, "Encoding %d", encoding);
+ return AVERROR_PATCHWELCOME;
+ }
- buf += 825;
+ buf += 820;
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 };
+
+ if (offset >= 1724 + 4) {
+ buf = avpkt->data + 1724;
+ i = read32(&buf, endian);
+ if(i) {
+ AVRational q = av_d2q(av_int2float(i), 4096);
+ if (q.num > 0 && q.den > 0)
+ avctx->framerate = q;
+ }
+ }
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;
+ case 6: // Y
+ elements = 1;
+ break;
+ case 52: // ABGR
+ case 51: // RGBA
+ case 103: // UYVA4444
+ elements = 4;
+ break;
+ case 50: // RGB
+ case 102: // UYV444
+ elements = 3;
+ break;
+ case 100: // UYVY422
+ elements = 2;
+ break;
+ default:
+ avpriv_report_missing_feature(avctx, "Descriptor %d", descriptor);
+ return AVERROR_PATCHWELCOME;
}
switch (bits_per_color) {
- case 8:
- if (elements == 4) {
- avctx->pix_fmt = AV_PIX_FMT_RGBA;
- } else {
- avctx->pix_fmt = AV_PIX_FMT_RGB24;
- }
- source_packet_size = elements;
- target_packet_size = elements;
- break;
- case 10:
- avctx->pix_fmt = AV_PIX_FMT_RGB48;
- target_packet_size = 6;
- source_packet_size = 4;
- break;
- case 12:
- case 16:
- if (endian) {
- avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
- } else {
- avctx->pix_fmt = AV_PIX_FMT_RGB48LE;
- }
- target_packet_size = 6;
- source_packet_size = elements * 2;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unsupported color depth : %d\n", bits_per_color);
+ case 8:
+ stride = avctx->width * elements;
+ break;
+ case 10:
+ if (!packing) {
+ av_log(avctx, AV_LOG_ERROR, "Packing to 32bit required\n");
+ return -1;
+ }
+ stride = (avctx->width * elements + 2) / 3 * 4;
+ break;
+ case 12:
+ if (!packing) {
+ av_log(avctx, AV_LOG_ERROR, "Packing to 16bit required\n");
+ return -1;
+ }
+ stride = 2 * avctx->width * elements;
+ break;
+ case 16:
+ stride = 2 * avctx->width * elements;
+ break;
+ case 1:
+ case 32:
+ case 64:
+ avpriv_report_missing_feature(avctx, "Depth %d", bits_per_color);
+ return AVERROR_PATCHWELCOME;
+ default:
+ return AVERROR_INVALIDDATA;
+ }
+
+ // Table 3c: Runs will always break at scan line boundaries. Packing
+ // will always break to the next 32-bit word at scan-line boundaries.
+ // Unfortunately, the encoder produced invalid files, so attempt
+ // to detect it
+ need_align = FFALIGN(stride, 4);
+ if (need_align*avctx->height + (int64_t)offset > avpkt->size) {
+ // Alignment seems unappliable, try without
+ if (stride*avctx->height + (int64_t)offset > avpkt->size) {
+ av_log(avctx, AV_LOG_ERROR, "Overread buffer. Invalid header?\n");
return AVERROR_INVALIDDATA;
+ } else {
+ av_log(avctx, AV_LOG_INFO, "Decoding DPX without scanline "
+ "alignment.\n");
+ need_align = 0;
+ }
+ } else {
+ need_align -= stride;
+ stride = FFALIGN(stride, 4);
}
- if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
- return ret;
+ switch (1000 * descriptor + 10 * bits_per_color + endian) {
+ case 6081:
+ case 6080:
+ avctx->pix_fmt = AV_PIX_FMT_GRAY8;
+ break;
+ case 50081:
+ case 50080:
+ avctx->pix_fmt = AV_PIX_FMT_RGB24;
+ break;
+ case 52081:
+ case 52080:
+ avctx->pix_fmt = AV_PIX_FMT_ABGR;
+ break;
+ case 51081:
+ case 51080:
+ avctx->pix_fmt = AV_PIX_FMT_RGBA;
+ break;
+ case 50100:
+ case 51100:
+ case 50101:
+ case 51101:
+ avctx->pix_fmt = AV_PIX_FMT_GBRP10;
+ break;
+ case 50120:
+ case 51120:
+ case 50121:
+ case 51121:
+ avctx->pix_fmt = AV_PIX_FMT_GBRP12;
+ break;
+ case 6161:
+ avctx->pix_fmt = AV_PIX_FMT_GRAY16BE;
+ break;
+ case 6160:
+ avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
+ break;
+ case 50161:
+ avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
+ break;
+ case 50160:
+ avctx->pix_fmt = AV_PIX_FMT_RGB48LE;
+ break;
+ case 51161:
+ avctx->pix_fmt = AV_PIX_FMT_RGBA64BE;
+ break;
+ case 51160:
+ avctx->pix_fmt = AV_PIX_FMT_RGBA64LE;
+ break;
+ case 100081:
+ avctx->pix_fmt = AV_PIX_FMT_UYVY422;
+ break;
+ case 102081:
+ avctx->pix_fmt = AV_PIX_FMT_YUV444P;
+ break;
+ case 103081:
+ avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Unsupported format\n");
+ return AVERROR_PATCHWELCOME;
+ }
ff_set_sar(avctx, avctx->sample_aspect_ratio);
- if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
- }
// Move pointer to offset from start of file
buf = avpkt->data + offset;
- ptr = p->data[0];
- stride = p->linesize[0];
+ for (i=0; i<AV_NUM_DATA_POINTERS; i++)
+ ptr[i] = p->data[i];
- if (source_packet_size*avctx->width*avctx->height > buf_end - buf) {
- 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 = (uint16_t*)ptr;
- for (y = 0; y < avctx->width; y++) {
- rgbBuffer = read32(&buf, endian);
- // Read out the 10-bit colors and convert to 16-bit
- *dst++ = make_16bit(rgbBuffer >> 16);
- *dst++ = make_16bit(rgbBuffer >> 6);
- *dst++ = make_16bit(rgbBuffer << 4);
- }
- ptr += stride;
+ 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);
}
- break;
- case 8:
- case 12: // Treat 12-bit as 16-bit
- case 16:
- if (source_packet_size == target_packet_size) {
- for (x = 0; x < avctx->height; x++) {
- memcpy(ptr, buf, target_packet_size*avctx->width);
- ptr += stride;
- buf += source_packet_size*avctx->width;
- }
- } else {
- for (x = 0; x < avctx->height; x++) {
- uint8_t *dst = ptr;
- for (y = 0; y < avctx->width; y++) {
- memcpy(dst, buf, target_packet_size);
- dst += target_packet_size;
- buf += source_packet_size;
- }
- ptr += stride;
+ n_datum = 0;
+ 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] = read16(&buf, endian) >> 4;
+ dst[2]++;
+ *dst[0] = read16(&buf, endian) >> 4;
+ dst[0]++;
+ *dst[1] = read16(&buf, endian) >> 4;
+ dst[1]++;
+ // For 12 bit, ignore alpha
+ if (elements == 4)
+ buf += 2;
+ // Jump to next aligned position
+ buf += need_align;
+ }
+ for (i = 0; i < 3; i++)
+ ptr[i] += p->linesize[i];
+ }
+ break;
+ case 16:
+ elements *= 2;
+ case 8:
+ if ( avctx->pix_fmt == AV_PIX_FMT_YUVA444P
+ || avctx->pix_fmt == AV_PIX_FMT_YUV444P) {
+ for (x = 0; x < avctx->height; x++) {
+ ptr[0] = p->data[0] + x * p->linesize[0];
+ ptr[1] = p->data[1] + x * p->linesize[1];
+ ptr[2] = p->data[2] + x * p->linesize[2];
+ ptr[3] = p->data[3] + x * p->linesize[3];
+ for (y = 0; y < avctx->width; y++) {
+ *ptr[1]++ = *buf++;
+ *ptr[0]++ = *buf++;
+ *ptr[2]++ = *buf++;
+ if (avctx->pix_fmt == AV_PIX_FMT_YUVA444P)
+ *ptr[3]++ = *buf++;
}
}
- break;
+ } else {
+ av_image_copy_plane(ptr[0], p->linesize[0],
+ buf, stride,
+ elements * avctx->width, avctx->height);
+ }
+ break;
}
*got_frame = 1;
AVCodec ff_dpx_decoder = {
.name = "dpx",
- .long_name = NULL_IF_CONFIG_SMALL("DPX image"),
+ .long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_DPX,
.decode = decode_frame,
projects / ffmpeg / blobdiff