* exr_flt2uint() and exr_halflt2uint() is credited to Reimar Döffinger
*/
+#include <zlib.h>
+
#include "avcodec.h"
#include "bytestream.h"
+#include "mathops.h"
+#include "thread.h"
#include "libavutil/imgutils.h"
enum ExrCompr {
EXR_ZIP1 = 2,
EXR_ZIP16 = 3,
EXR_PIZ = 4,
- EXR_B44 = 6
+ EXR_B44 = 6,
+ EXR_B44A = 7,
};
typedef struct EXRContext {
AVFrame picture;
int compr;
int bits_per_color_id;
- int8_t channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
+ int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
+
+ uint8_t *uncompressed_data;
+ int uncompressed_size;
+
+ uint8_t *tmp;
+ int tmp_size;
} EXRContext;
/**
return -1;
}
+static void predictor(uint8_t *src, int size)
+{
+ uint8_t *t = src + 1;
+ uint8_t *stop = src + size;
+
+ while (t < stop) {
+ int d = (int)t[-1] + (int)t[0] - 128;
+ t[0] = d;
+ ++t;
+ }
+}
+
+static void reorder_pixels(uint8_t *src, uint8_t *dst, int size)
+{
+ const int8_t *t1 = src;
+ const int8_t *t2 = src + (size + 1) / 2;
+ int8_t *s = dst;
+ int8_t *stop = s + size;
+
+ while (1) {
+ if (s < stop)
+ *(s++) = *(t1++);
+ else
+ break;
+
+ if (s < stop)
+ *(s++) = *(t2++);
+ else
+ break;
+ }
+}
+
+static int rle_uncompress(const uint8_t *src, int ssize, uint8_t *dst, int dsize)
+{
+ int8_t *d = (int8_t *)dst;
+ int8_t *s = (int8_t *)src;
+ int8_t *dend = d + dsize;
+ int count;
+
+ while (ssize > 0) {
+ count = *s++;
+
+ if (count < 0) {
+ count = -count;
+
+ if ((dsize -= count ) < 0 ||
+ (ssize -= count + 1) < 0)
+ return -1;
+
+ while (count--)
+ *d++ = *s++;
+ } else {
+ count++;
+
+ if ((dsize -= count) < 0 ||
+ (ssize -= 2 ) < 0)
+ return -1;
+
+ while (count--)
+ *d++ = *s;
+
+ s++;
+ }
+ }
+
+ return dend != d;
+}
+
static int decode_frame(AVCodecContext *avctx,
void *data,
int *data_size,
AVFrame *const p = &s->picture;
uint8_t *ptr;
- int i, x, y, stride, magic_number, version_flag;
+ int i, x, y, stride, magic_number, version_flag, ret;
int w = 0;
int h = 0;
unsigned int xmin = ~0;
unsigned int ymax = ~0;
unsigned int xdelta = ~0;
+ int out_line_size;
+ int bxmin, axmax;
+ int scan_lines_per_block;
+ unsigned long scan_line_size;
+ unsigned long uncompressed_size;
+
unsigned int current_channel_offset = 0;
s->channel_offsets[0] = -1;
s->channel_offsets[3] = -1;
s->bits_per_color_id = -1;
- if (buf_end - buf < 10) {
+ if (buf_size < 10) {
av_log(avctx, AV_LOG_ERROR, "Too short header to parse\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
magic_number = bytestream_get_le32(&buf);
if (magic_number != 20000630) { // As per documentation of OpenEXR it's supposed to be int 20000630 little-endian
av_log(avctx, AV_LOG_ERROR, "Wrong magic number %d\n", magic_number);
- return -1;
+ return AVERROR_INVALIDDATA;
}
version_flag = bytestream_get_le32(&buf);
if ((version_flag & 0x200) == 0x200) {
av_log(avctx, AV_LOG_ERROR, "Tile based images are not supported\n");
- return -1;
+ return AVERROR_PATCHWELCOME;
}
// Parse the header
if (check_header_variable(avctx, &buf, buf_end, "channels", "chlist", 38, &variable_buffer_data_size) >= 0) {
const uint8_t *channel_list_end;
if (!variable_buffer_data_size)
- return -1;
+ return AVERROR_INVALIDDATA;
channel_list_end = buf + variable_buffer_data_size;
while (channel_list_end - buf >= 19) {
if (!strcmp(buf, "R"))
channel_index = 0;
- if (!strcmp(buf, "G"))
+ else if (!strcmp(buf, "G"))
channel_index = 1;
- if (!strcmp(buf, "B"))
+ else if (!strcmp(buf, "B"))
channel_index = 2;
- if (!strcmp(buf, "A"))
+ else if (!strcmp(buf, "A"))
channel_index = 3;
+ else
+ av_log(avctx, AV_LOG_WARNING, "Unsupported channel %.256s\n", buf);
while (bytestream_get_byte(&buf) && buf < channel_list_end)
continue; /* skip */
if (channel_list_end - * &buf < 4) {
av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
current_bits_per_color_id = bytestream_get_le32(&buf);
if (current_bits_per_color_id > 2) {
av_log(avctx, AV_LOG_ERROR, "Unknown color format\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (channel_index >= 0) {
if (s->bits_per_color_id != -1 && s->bits_per_color_id != current_bits_per_color_id) {
av_log(avctx, AV_LOG_ERROR, "RGB channels not of the same depth\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
s->bits_per_color_id = current_bits_per_color_id;
s->channel_offsets[channel_index] = current_channel_offset;
av_log(avctx, AV_LOG_ERROR, "Missing green channel\n");
if (s->channel_offsets[2] < 0)
av_log(avctx, AV_LOG_ERROR, "Missing blue channel\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
buf = channel_list_end;
// Process the dataWindow variable
if (check_header_variable(avctx, &buf, buf_end, "dataWindow", "box2i", 31, &variable_buffer_data_size) >= 0) {
if (!variable_buffer_data_size)
- return -1;
+ return AVERROR_INVALIDDATA;
xmin = AV_RL32(buf);
ymin = AV_RL32(buf + 4);
// Process the displayWindow variable
if (check_header_variable(avctx, &buf, buf_end, "displayWindow", "box2i", 34, &variable_buffer_data_size) >= 0) {
if (!variable_buffer_data_size)
- return -1;
+ return AVERROR_INVALIDDATA;
w = AV_RL32(buf + 8) + 1;
h = AV_RL32(buf + 12) + 1;
// Process the lineOrder variable
if (check_header_variable(avctx, &buf, buf_end, "lineOrder", "lineOrder", 25, &variable_buffer_data_size) >= 0) {
if (!variable_buffer_data_size)
- return -1;
+ return AVERROR_INVALIDDATA;
if (*buf) {
av_log(avctx, AV_LOG_ERROR, "Doesn't support this line order : %d\n", *buf);
- return -1;
+ return AVERROR_PATCHWELCOME;
}
buf += variable_buffer_data_size;
continue;
}
+ // Process the pixelAspectRatio variable
+ if (check_header_variable(avctx, &buf, buf_end, "pixelAspectRatio", "float", 31, &variable_buffer_data_size) >= 0) {
+ if (!variable_buffer_data_size)
+ return AVERROR_INVALIDDATA;
+
+ avctx->sample_aspect_ratio = av_d2q(av_int2float(AV_RL32(buf)), 255);
+
+ buf += variable_buffer_data_size;
+ continue;
+ }
+
// Process the compression variable
if (check_header_variable(avctx, &buf, buf_end, "compression", "compression", 29, &variable_buffer_data_size) >= 0) {
if (!variable_buffer_data_size)
- return -1;
+ return AVERROR_INVALIDDATA;
- s->compr = *buf;
- switch (s->compr) {
- case EXR_RAW:
- break;
- case EXR_RLE:
- case EXR_ZIP1:
- case EXR_ZIP16:
- case EXR_PIZ:
- case EXR_B44:
- default:
- av_log(avctx, AV_LOG_ERROR, "Compression type %d is not supported\n", s->compr);
- return -1;
- }
+ if (s->compr == -1)
+ s->compr = *buf;
+ else
+ av_log(avctx, AV_LOG_WARNING, "Found more than one compression attribute\n");
buf += variable_buffer_data_size;
continue;
// Check if there is enough bytes for a header
if (buf_end - buf <= 9) {
av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
// Process unknown variables
variable_buffer_data_size = get_header_variable_length(&buf, buf_end);
if (!variable_buffer_data_size) {
av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
buf += variable_buffer_data_size;
}
}
+ if (s->compr == -1) {
+ av_log(avctx, AV_LOG_ERROR, "Missing compression attribute\n");
+ return AVERROR_INVALIDDATA;
+ }
+
if (buf >= buf_end) {
av_log(avctx, AV_LOG_ERROR, "Incomplete frame\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
buf++;
// 8-bit
case 0:
av_log_missing_feature(avctx, "8-bit OpenEXR", 1);
- return -1;
+ return AVERROR_PATCHWELCOME;
default:
av_log(avctx, AV_LOG_ERROR, "Unknown color format : %d\n", s->bits_per_color_id);
- return -1;
+ return AVERROR_INVALIDDATA;
+ }
+
+ switch (s->compr) {
+ case EXR_RAW:
+ case EXR_RLE:
+ case EXR_ZIP1:
+ scan_lines_per_block = 1;
+ break;
+ case EXR_ZIP16:
+ scan_lines_per_block = 16;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Compression type %d is not supported\n", s->compr);
+ return AVERROR_PATCHWELCOME;
}
if (s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
+ ff_thread_release_buffer(avctx, &s->picture);
if (av_image_check_size(w, h, 0, avctx))
- return -1;
+ return AVERROR_INVALIDDATA;
// Verify the xmin, xmax, ymin, ymax and xdelta before setting the actual image size
if (xmin > xmax || ymin > ymax || xdelta != xmax - xmin + 1 || xmax >= w || ymax >= h) {
av_log(avctx, AV_LOG_ERROR, "Wrong sizing or missing size information\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (w != avctx->width || h != avctx->height) {
avcodec_set_dimensions(avctx, w, h);
}
- if (avctx->get_buffer(avctx, p) < 0) {
+ bxmin = xmin * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;
+ axmax = (avctx->width - (xmax + 1)) * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;
+ out_line_size = avctx->width * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;
+ scan_line_size = xdelta * current_channel_offset;
+ uncompressed_size = scan_line_size * scan_lines_per_block;
+
+ if (s->compr != EXR_RAW) {
+ av_fast_padded_malloc(&s->uncompressed_data, &s->uncompressed_size, uncompressed_size);
+ av_fast_padded_malloc(&s->tmp, &s->tmp_size, uncompressed_size);
+ if (!s->uncompressed_data || !s->tmp)
+ return AVERROR(ENOMEM);
+ }
+
+ if ((ret = ff_thread_get_buffer(avctx, p)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
ptr = p->data[0];
// Zero out the start if ymin is not 0
for (y = 0; y < ymin; y++) {
- memset(ptr, 0, avctx->width * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components);
+ memset(ptr, 0, out_line_size);
ptr += stride;
}
- // Process the actual lines
- for (y = ymin; y <= ymax; y++) {
+ // Process the actual scan line blocks
+ for (y = ymin; y <= ymax; y += scan_lines_per_block) {
uint16_t *ptr_x = (uint16_t *)ptr;
if (buf_end - buf > 8) {
/* Read the lineoffset from the line offset table and add 8 bytes
to skip the coordinates and data size fields */
const uint64_t line_offset = bytestream_get_le64(&buf) + 8;
+ int32_t data_size;
+
// Check if the buffer has the required bytes needed from the offset
- if (line_offset > avpkt->size - xdelta * current_channel_offset) {
+ if ((line_offset > buf_size) ||
+ (s->compr == EXR_RAW && line_offset > avpkt->size - xdelta * current_channel_offset) ||
+ (s->compr != EXR_RAW && line_offset > buf_size - (data_size = AV_RL32(avpkt->data + line_offset - 4)))) {
// Line offset is probably wrong and not inside the buffer
av_log(avctx, AV_LOG_WARNING, "Line offset for line %d is out of reach setting it to black\n", y);
- memset(ptr_x, 0, avctx->width * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components);
+ for (i = 0; i < scan_lines_per_block && y + i <= ymax; i++, ptr += stride) {
+ ptr_x = (uint16_t *)ptr;
+ memset(ptr_x, 0, out_line_size);
+ }
} else {
- const uint8_t *red_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[0];
- const uint8_t *green_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[1];
- const uint8_t *blue_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[2];
- const uint8_t *alpha_channel_buffer = 0;
-
- if (s->channel_offsets[3] >= 0)
- alpha_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[3];
-
- // Zero out the start if xmin is not 0
- memset(ptr_x, 0, xmin * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components);
- ptr_x += xmin * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;
- if (s->bits_per_color_id == 2) {
- // 32-bit
- for (x = 0; x < xdelta; x++) {
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&red_channel_buffer));
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&green_channel_buffer));
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&blue_channel_buffer));
- if (alpha_channel_buffer)
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&alpha_channel_buffer));
+ const uint8_t *red_channel_buffer, *green_channel_buffer, *blue_channel_buffer, *alpha_channel_buffer = 0;
+
+ if ((s->compr == EXR_ZIP1 || s->compr == EXR_ZIP16) && data_size < uncompressed_size) {
+ unsigned long dest_len = uncompressed_size;
+
+ if (uncompress(s->tmp, &dest_len, avpkt->data + line_offset, data_size) != Z_OK ||
+ dest_len != uncompressed_size) {
+ av_log(avctx, AV_LOG_ERROR, "error during zlib decompression\n");
+ return AVERROR(EINVAL);
}
- } else {
- // 16-bit
- for (x = 0; x < xdelta; x++) {
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&red_channel_buffer));
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&green_channel_buffer));
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&blue_channel_buffer));
- if (alpha_channel_buffer)
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&alpha_channel_buffer));
+ } else if (s->compr == EXR_RLE && data_size < uncompressed_size) {
+ if (rle_uncompress(avpkt->data + line_offset, data_size, s->tmp, uncompressed_size)) {
+ av_log(avctx, AV_LOG_ERROR, "error during rle decompression\n");
+ return AVERROR(EINVAL);
}
}
- // Zero out the end if xmax+1 is not w
- memset(ptr_x, 0, (avctx->width - (xmax + 1)) * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components);
- ptr_x += (avctx->width - (xmax + 1)) * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;
+ if (s->compr != EXR_RAW && data_size < uncompressed_size) {
+ predictor(s->tmp, uncompressed_size);
+ reorder_pixels(s->tmp, s->uncompressed_data, uncompressed_size);
+
+ red_channel_buffer = s->uncompressed_data + xdelta * s->channel_offsets[0];
+ green_channel_buffer = s->uncompressed_data + xdelta * s->channel_offsets[1];
+ blue_channel_buffer = s->uncompressed_data + xdelta * s->channel_offsets[2];
+ if (s->channel_offsets[3] >= 0)
+ alpha_channel_buffer = s->uncompressed_data + xdelta * s->channel_offsets[3];
+ } else {
+ red_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[0];
+ green_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[1];
+ blue_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[2];
+ if (s->channel_offsets[3] >= 0)
+ alpha_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[3];
+ }
+
+ for (i = 0; i < scan_lines_per_block && y + i <= ymax; i++, ptr += stride) {
+ const uint8_t *r, *g, *b, *a;
+
+ r = red_channel_buffer;
+ g = green_channel_buffer;
+ b = blue_channel_buffer;
+ if (alpha_channel_buffer)
+ a = alpha_channel_buffer;
+
+ ptr_x = (uint16_t *)ptr;
+
+ // Zero out the start if xmin is not 0
+ memset(ptr_x, 0, bxmin);
+ ptr_x += xmin * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;
+ if (s->bits_per_color_id == 2) {
+ // 32-bit
+ for (x = 0; x < xdelta; x++) {
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&r));
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&g));
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&b));
+ if (alpha_channel_buffer)
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&a));
+ }
+ } else {
+ // 16-bit
+ for (x = 0; x < xdelta; x++) {
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&r));
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&g));
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&b));
+ if (alpha_channel_buffer)
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&a));
+ }
+ }
+
+ // Zero out the end if xmax+1 is not w
+ memset(ptr_x, 0, axmax);
+ red_channel_buffer += scan_line_size;
+ green_channel_buffer += scan_line_size;
+ blue_channel_buffer += scan_line_size;
+ if (alpha_channel_buffer)
+ alpha_channel_buffer += scan_line_size;
+ }
}
- // Move to next line
- ptr += stride;
}
}
// Zero out the end if ymax+1 is not h
for (y = ymax + 1; y < avctx->height; y++) {
- memset(ptr, 0, avctx->width * 2 * av_pix_fmt_descriptors[avctx->pix_fmt].nb_components);
+ memset(ptr, 0, out_line_size);
ptr += stride;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
EXRContext *s = avctx->priv_data;
+
avcodec_get_frame_defaults(&s->picture);
avctx->coded_frame = &s->picture;
+
+ s->compr = -1;
+
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
EXRContext *s = avctx->priv_data;
+
if (s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
+ av_freep(&s->uncompressed_data);
+ av_freep(&s->tmp);
+
return 0;
}
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
.long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
};
projects / ffmpeg / blobdiff