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https://github.com/xenia-project/FFmpeg.git
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dpx: 10 and 12 bit decoding
Rewrite 10 bit dpx decoder to decode into GBRP10 color space instead of converting to RGB48. Add 12 bit decoder to decode into GBRP12 color space. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Georg Lippitsch
Michael Niedermayer
parent
99f5090714
commit
5cc5d9d5f7
@ -41,14 +41,6 @@ static unsigned int read32(const uint8_t **ptr, int is_big)
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return temp;
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}
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static inline unsigned make_16bit(unsigned value)
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{
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// mask away invalid bits
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value &= 0xFFC0;
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// correctly expand to 16 bits
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return value + (value >> 10);
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}
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static int decode_frame(AVCodecContext *avctx,
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void *data,
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int *data_size,
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@ -60,12 +52,13 @@ static int decode_frame(AVCodecContext *avctx,
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DPXContext *const s = avctx->priv_data;
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AVFrame *picture = data;
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AVFrame *const p = &s->picture;
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uint8_t *ptr;
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uint8_t *ptr[AV_NUM_DATA_POINTERS];
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unsigned int offset;
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int magic_num, endian;
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int x, y;
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int x, y, i;
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int w, h, stride, bits_per_color, descriptor, elements, target_packet_size, source_packet_size;
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int planar;
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unsigned int rgbBuffer;
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@ -138,13 +131,24 @@ static int decode_frame(AVCodecContext *avctx,
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}
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source_packet_size = elements;
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target_packet_size = elements;
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planar = 0;
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break;
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case 10:
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avctx->pix_fmt = PIX_FMT_RGB48;
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avctx->pix_fmt = PIX_FMT_GBRP10;
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target_packet_size = 6;
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source_packet_size = 4;
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planar = 1;
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break;
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case 12:
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if (endian) {
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avctx->pix_fmt = elements == 4 ? PIX_FMT_GBRP12BE : PIX_FMT_GBRP12BE;
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} else {
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avctx->pix_fmt = elements == 4 ? PIX_FMT_GBRP12LE : PIX_FMT_GBRP12LE;
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}
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target_packet_size = 6;
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source_packet_size = 6;
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planar = 1;
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break;
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case 16:
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if (endian) {
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avctx->pix_fmt = elements == 4 ? PIX_FMT_RGBA64BE : PIX_FMT_RGB48BE;
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@ -153,6 +157,7 @@ static int decode_frame(AVCodecContext *avctx,
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}
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target_packet_size =
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source_packet_size = elements * 2;
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planar = 0;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Unsupported color depth : %d\n", bits_per_color);
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@ -173,7 +178,8 @@ static int decode_frame(AVCodecContext *avctx,
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// Move pointer to offset from start of file
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buf = avpkt->data + offset;
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ptr = p->data[0];
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for (i=0; i<AV_NUM_DATA_POINTERS; i++)
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ptr[i] = p->data[i];
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stride = p->linesize[0];
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if (source_packet_size*avctx->width*avctx->height > buf_end - buf) {
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@ -183,35 +189,56 @@ static int decode_frame(AVCodecContext *avctx,
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switch (bits_per_color) {
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case 10:
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for (x = 0; x < avctx->height; x++) {
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uint16_t *dst = (uint16_t*)ptr;
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uint16_t *dst[3] = {(uint16_t*)ptr[0],
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(uint16_t*)ptr[1],
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(uint16_t*)ptr[2]};
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for (y = 0; y < avctx->width; y++) {
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rgbBuffer = read32(&buf, endian);
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// Read out the 10-bit colors and convert to 16-bit
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*dst++ = make_16bit(rgbBuffer >> 16);
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*dst++ = make_16bit(rgbBuffer >> 6);
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*dst++ = make_16bit(rgbBuffer << 4);
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*dst[0]++ = (rgbBuffer >> 12) & 0x3FF;
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*dst[1]++ = (rgbBuffer >> 2) & 0x3FF;
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*dst[2]++ = (rgbBuffer >> 22) & 0x3FF;
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}
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ptr += stride;
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for (i=0; i<3; i++)
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ptr[i] += p->linesize[i];
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}
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break;
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case 8:
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case 12: // Treat 12-bit as 16-bit
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case 12:
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case 16:
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if (source_packet_size == target_packet_size) {
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if (planar) {
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int source_bpc = target_packet_size / elements;
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int target_bpc = target_packet_size / elements;
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for (x = 0; x < avctx->height; x++) {
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memcpy(ptr, buf, target_packet_size*avctx->width);
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ptr += stride;
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buf += source_packet_size*avctx->width;
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uint8_t *dst[AV_NUM_DATA_POINTERS];
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for (i=0; i<elements; i++)
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dst[i] = ptr[i];
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for (y = 0; y < avctx->width; y++) {
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for (i=0; i<3; i++) {
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memcpy(dst[i], buf, FFMIN(source_bpc, target_bpc));
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dst[i] += target_bpc;
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buf += source_bpc;
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}
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}
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for (i=0; i<elements; i++)
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ptr[i] += p->linesize[i];
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}
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} else {
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for (x = 0; x < avctx->height; x++) {
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uint8_t *dst = ptr;
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for (y = 0; y < avctx->width; y++) {
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memcpy(dst, buf, target_packet_size);
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dst += target_packet_size;
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buf += source_packet_size;
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if (source_packet_size == target_packet_size) {
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for (x = 0; x < avctx->height; x++) {
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memcpy(ptr[0], buf, target_packet_size*avctx->width);
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ptr[0] += stride;
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buf += source_packet_size*avctx->width;
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}
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} else {
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for (x = 0; x < avctx->height; x++) {
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uint8_t *dst = ptr[0];
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for (y = 0; y < avctx->width; y++) {
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memcpy(dst, buf, target_packet_size);
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dst += target_packet_size;
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buf += source_packet_size;
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}
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ptr[0] += stride;
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}
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ptr += stride;
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}
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}
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break;
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@ -5,5 +5,5 @@
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./tests/data/images/dpx/%02d.dpx CRC=0xe5b9c023
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609920 ./tests/data/images/dpx/02.dpx
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13dc41b1e1e36399a5e1f8b7e3344a81 *./tests/data/images/dpx/02.dpx
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./tests/data/images/dpx/%02d.dpx CRC=0xf38d5830
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./tests/data/images/dpx/%02d.dpx CRC=0xf0a1c097
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407168 ./tests/data/images/dpx/02.dpx
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