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mpeg12.c
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mpeg12.c
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/*
* Copyright (c) 2013 Jens Kuske <jenskuske@gmail.com>
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <string.h>
#include <cedrus/cedrus.h>
#include <cedrus/cedrus_regs.h>
#include "vdpau_private.h"
static const uint8_t zigzag_scan[64] =
{
0, 1, 5, 6, 14, 15, 27, 28,
2, 4, 7, 13, 16, 26, 29, 42,
3, 8, 12, 17, 25, 30, 41, 43,
9, 11, 18, 24, 31, 40, 44, 53,
10, 19, 23, 32, 39, 45, 52, 54,
20, 22, 33, 38, 46, 51, 55, 60,
21, 34, 37, 47, 50, 56, 59, 61,
35, 36, 48, 49, 57, 58, 62, 63
};
static int mpeg_find_startcode(const uint8_t *data, int len)
{
int pos = 0;
while (pos < len)
{
int zeros = 0;
for ( ; pos < len; pos++)
{
if (data[pos] == 0x00)
zeros++;
else if (data[pos] == 0x01 && zeros >= 2)
{
pos++;
break;
}
else
zeros = 0;
}
uint8_t marker = data[pos++];
if (marker >= 0x01 && marker <= 0xaf)
return pos - 4;
}
return 0;
}
static VdpStatus mpeg12_decode(decoder_ctx_t *decoder,
VdpPictureInfo const *_info,
const int len,
video_surface_ctx_t *output)
{
VdpPictureInfoMPEG1Or2 const *info = (VdpPictureInfoMPEG1Or2 const *)_info;
int start_offset = mpeg_find_startcode(cedrus_mem_get_pointer(decoder->data), len);
VdpStatus ret = yuv_prepare(output);
if (ret != VDP_STATUS_OK)
return ret;
int i;
// activate MPEG engine
void *ve_regs = cedrus_ve_get(decoder->device->cedrus, CEDRUS_ENGINE_MPEG, 0);
// set quantisation tables
for (i = 0; i < 64; i++)
writel((uint32_t)(64 + zigzag_scan[i]) << 8 | info->intra_quantizer_matrix[i], ve_regs + VE_MPEG_IQ_MIN_INPUT);
for (i = 0; i < 64; i++)
writel((uint32_t)(zigzag_scan[i]) << 8 | info->non_intra_quantizer_matrix[i], ve_regs + VE_MPEG_IQ_MIN_INPUT);
// set size
uint16_t width = (decoder->width + 15) / 16;
uint16_t height = (decoder->height + 15) / 16;
writel((width << 8) | height, ve_regs + VE_MPEG_SIZE);
writel(((width * 16) << 16) | (height * 16), ve_regs + VE_MPEG_FRAME_SIZE);
// set picture header
uint32_t pic_header = 0;
pic_header |= ((info->picture_coding_type & 0xf) << 28);
pic_header |= ((info->f_code[0][0] & 0xf) << 24);
pic_header |= ((info->f_code[0][1] & 0xf) << 20);
pic_header |= ((info->f_code[1][0] & 0xf) << 16);
pic_header |= ((info->f_code[1][1] & 0xf) << 12);
pic_header |= ((info->intra_dc_precision & 0x3) << 10);
pic_header |= ((info->picture_structure & 0x3) << 8);
pic_header |= ((info->top_field_first & 0x1) << 7);
pic_header |= ((info->frame_pred_frame_dct & 0x1) << 6);
pic_header |= ((info->concealment_motion_vectors & 0x1) << 5);
pic_header |= ((info->q_scale_type & 0x1) << 4);
pic_header |= ((info->intra_vlc_format & 0x1) << 3);
pic_header |= ((info->alternate_scan & 0x1) << 2);
pic_header |= ((info->full_pel_forward_vector & 0x1) << 1);
pic_header |= ((info->full_pel_backward_vector & 0x1) << 0);
if (decoder->profile == VDP_DECODER_PROFILE_MPEG1)
pic_header |= 0x000003c0;
writel(pic_header, ve_regs + VE_MPEG_PIC_HDR);
// ??
writel(0x80000138 | (1 << 7), ve_regs + VE_MPEG_CTRL);
if (cedrus_get_ve_version(decoder->device->cedrus) >= 0x1680)
{
writel((0x2 << 30) | (0x1 << 28) | (output->chroma_size / 2), ve_regs + VE_EXTRA_OUT_FMT_OFFSET);
writel((0x2 << 4), ve_regs + 0x0ec);
writel(output->chroma_size / 2, ve_regs + 0x0c4);
writel((ALIGN(decoder->width / 2, 16) << 16) | ALIGN(decoder->width, 32), ve_regs + 0x0c8);
}
// set forward/backward predicion buffers
if (info->forward_reference != VDP_INVALID_HANDLE)
{
video_surface_ctx_t *forward = handle_get(info->forward_reference);
writel(cedrus_mem_get_bus_addr(forward->yuv->data), ve_regs + VE_MPEG_FWD_LUMA);
writel(cedrus_mem_get_bus_addr(forward->yuv->data) + forward->luma_size, ve_regs + VE_MPEG_FWD_CHROMA);
}
if (info->backward_reference != VDP_INVALID_HANDLE)
{
video_surface_ctx_t *backward = handle_get(info->backward_reference);
writel(cedrus_mem_get_bus_addr(backward->yuv->data), ve_regs + VE_MPEG_BACK_LUMA);
writel(cedrus_mem_get_bus_addr(backward->yuv->data) + backward->luma_size, ve_regs + VE_MPEG_BACK_CHROMA);
}
// set output buffers (Luma / Croma)
writel(cedrus_mem_get_bus_addr(output->yuv->data), ve_regs + VE_MPEG_REC_LUMA);
writel(cedrus_mem_get_bus_addr(output->yuv->data) + output->luma_size, ve_regs + VE_MPEG_REC_CHROMA);
writel(cedrus_mem_get_bus_addr(output->yuv->data), ve_regs + VE_MPEG_ROT_LUMA);
writel(cedrus_mem_get_bus_addr(output->yuv->data) + output->luma_size, ve_regs + VE_MPEG_ROT_CHROMA);
// set input offset in bits
writel(start_offset * 8, ve_regs + VE_MPEG_VLD_OFFSET);
// set input length in bits
writel((len - start_offset) * 8, ve_regs + VE_MPEG_VLD_LEN);
// input end
uint32_t input_addr = cedrus_mem_get_bus_addr(decoder->data);
writel(input_addr + VBV_SIZE - 1, ve_regs + VE_MPEG_VLD_END);
// set input buffer
writel((input_addr & 0x0ffffff0) | (input_addr >> 28) | (0x7 << 28), ve_regs + VE_MPEG_VLD_ADDR);
// trigger
writel((((decoder->profile == VDP_DECODER_PROFILE_MPEG1) ? 1 : 2) << 24) | 0x8000000f, ve_regs + VE_MPEG_TRIGGER);
// wait for interrupt
cedrus_ve_wait(decoder->device->cedrus, 1);
// clean interrupt flag
writel(0x0000c00f, ve_regs + VE_MPEG_STATUS);
// stop MPEG engine
cedrus_ve_put(decoder->device->cedrus);
return VDP_STATUS_OK;
}
VdpStatus new_decoder_mpeg12(decoder_ctx_t *decoder)
{
decoder->decode = mpeg12_decode;
return VDP_STATUS_OK;
}