diff options
Diffstat (limited to 'libavcodec/dpx.c')
-rw-r--r-- | libavcodec/dpx.c | 427 |
1 files changed, 337 insertions, 90 deletions
diff --git a/libavcodec/dpx.c b/libavcodec/dpx.c index d4effa4..026fb10 100644 --- a/libavcodec/dpx.c +++ b/libavcodec/dpx.c @@ -2,29 +2,42 @@ * 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; @@ -37,12 +50,51 @@ static unsigned int read32(const uint8_t **ptr, int is_big) 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 uint16_t read12in32(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 = 7; + } + + switch (*n_datum){ + case 7: return *lbuf & 0xFFF; + case 6: return (*lbuf >> 12) & 0xFFF; + case 5: { + uint32_t c = *lbuf >> 24; + *lbuf = read32(ptr, is_big); + c |= *lbuf << 8; + return c & 0xFFF; + } + case 4: return (*lbuf >> 4) & 0xFFF; + case 3: return (*lbuf >> 16) & 0xFFF; + case 2: { + uint32_t c = *lbuf >> 28; + *lbuf = read32(ptr, is_big); + c |= *lbuf << 4; + return c & 0xFFF; + } + case 1: return (*lbuf >> 8) & 0xFFF; + default: return *lbuf >> 20; + } } static int decode_frame(AVCodecContext *avctx, @@ -51,17 +103,18 @@ 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"); @@ -87,11 +140,24 @@ static int decode_frame(AVCodecContext *avctx, 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]; @@ -100,108 +166,289 @@ static int decode_frame(AVCodecContext *avctx, 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; + 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) { + int tested = 0; + if (descriptor == 50 && endian && (avctx->width%8) == 0) { // Little endian and widths not a multiple of 8 need tests + tested = 1; + } + if (!tested) { + av_log(avctx, AV_LOG_ERROR, "Packing to 16bit required\n"); + return -1; } - 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; + } + stride = avctx->width * elements; + if (packing) { + stride *= 2; + } else { + stride *= 3; + if (stride % 8) { + stride /= 8; + stride++; + stride *= 8; } - 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); + stride /= 2; + } + 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 6121: + case 6120: + avctx->pix_fmt = AV_PIX_FMT_GRAY12; + 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 50101: + avctx->pix_fmt = AV_PIX_FMT_GBRP10; + break; + case 51100: + case 51101: + avctx->pix_fmt = AV_PIX_FMT_GBRAP10; + break; + case 50120: + case 50121: + avctx->pix_fmt = AV_PIX_FMT_GBRP12; + break; + case 51120: + case 51121: + avctx->pix_fmt = AV_PIX_FMT_GBRAP12; + 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[4] = {(uint16_t*)ptr[0], + (uint16_t*)ptr[1], + (uint16_t*)ptr[2], + (uint16_t*)ptr[3]}; + 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); + if (elements == 4) + *dst[3]++ = + 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; + n_datum = 0; + for (i = 0; i < elements; i++) + ptr[i] += p->linesize[i]; + } + break; + case 12: + for (x = 0; x < avctx->height; x++) { + uint16_t *dst[4] = {(uint16_t*)ptr[0], + (uint16_t*)ptr[1], + (uint16_t*)ptr[2], + (uint16_t*)ptr[3]}; + for (y = 0; y < avctx->width; y++) { + if (packing) { + if (elements >= 3) + *dst[2]++ = read16(&buf, endian) >> 4; + *dst[0] = read16(&buf, endian) >> 4; + dst[0]++; + if (elements >= 2) + *dst[1]++ = read16(&buf, endian) >> 4; + if (elements == 4) + *dst[3]++ = read16(&buf, endian) >> 4; + } else { + *dst[2]++ = read12in32(&buf, &rgbBuffer, + &n_datum, endian); + *dst[0]++ = read12in32(&buf, &rgbBuffer, + &n_datum, endian); + *dst[1]++ = read12in32(&buf, &rgbBuffer, + &n_datum, endian); + if (elements == 4) + *dst[3]++ = read12in32(&buf, &rgbBuffer, + &n_datum, endian); } - } 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; + } + for (i = 0; i < elements; i++) + ptr[i] += p->linesize[i]; + // Jump to next aligned position + buf += need_align; + } + 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; @@ -211,7 +458,7 @@ static int decode_frame(AVCodecContext *avctx, 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, |