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ffmpeg-rockchip/libavcodec/vaapi_encode_mjpeg.c
Mark Thompson 80a5d05108 vaapi_encode: Refactor initialisation 
This allows better checking of capabilities and will make it easier
to add more functionality later.

It also commonises some duplicated code around rate control setup
and adds more comments explaining the internals.
2016-09-28 22:54:10 +01:00

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/*
* This file is part of Libav.
*
* Libav 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <va/va.h>
#include <va/va_enc_jpeg.h>
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "internal.h"
#include "jpegtables.h"
#include "mjpeg.h"
#include "put_bits.h"
#include "vaapi_encode.h"
// Standard JPEG quantisation tables, in zigzag order.
static const unsigned char vaapi_encode_mjpeg_quant_luminance[64] = {
16, 11, 12, 14, 12, 10, 16, 14,
13, 14, 18, 17, 16, 19, 24, 40,
26, 24, 22, 22, 24, 49, 35, 37,
29, 40, 58, 51, 61, 60, 57, 51,
56, 55, 64, 72, 92, 78, 64, 68,
87, 69, 55, 56, 80, 109, 81, 87,
95, 98, 103, 104, 103, 62, 77, 113,
121, 112, 100, 120, 92, 101, 103, 99,
};
static const unsigned char vaapi_encode_mjpeg_quant_chrominance[64] = {
17, 18, 18, 24, 21, 24, 47, 26,
26, 47, 99, 66, 56, 66, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99,
};
typedef struct VAAPIEncodeMJPEGContext {
int quality;
int component_subsample_h[3];
int component_subsample_v[3];
VAQMatrixBufferJPEG quant_tables;
VAHuffmanTableBufferJPEGBaseline huffman_tables;
} VAAPIEncodeMJPEGContext;
static av_cold void vaapi_encode_mjpeg_copy_huffman(unsigned char *dst_lengths,
unsigned char *dst_values,
const unsigned char *src_lengths,
const unsigned char *src_values)
{
int i, mt;
++src_lengths;
mt = 0;
for (i = 0; i < 16; i++)
mt += (dst_lengths[i] = src_lengths[i]);
for (i = 0; i < mt; i++)
dst_values[i] = src_values[i];
}
static av_cold void vaapi_encode_mjpeg_init_tables(AVCodecContext *avctx)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAAPIEncodeMJPEGContext *priv = ctx->priv_data;
VAQMatrixBufferJPEG *quant = &priv->quant_tables;
VAHuffmanTableBufferJPEGBaseline *huff = &priv->huffman_tables;
int i;
quant->load_lum_quantiser_matrix = 1;
quant->load_chroma_quantiser_matrix = 1;
for (i = 0; i < 64; i++) {
quant->lum_quantiser_matrix[i] =
vaapi_encode_mjpeg_quant_luminance[i];
quant->chroma_quantiser_matrix[i] =
vaapi_encode_mjpeg_quant_chrominance[i];
}
huff->load_huffman_table[0] = 1;
vaapi_encode_mjpeg_copy_huffman(huff->huffman_table[0].num_dc_codes,
huff->huffman_table[0].dc_values,
avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc);
vaapi_encode_mjpeg_copy_huffman(huff->huffman_table[0].num_ac_codes,
huff->huffman_table[0].ac_values,
avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance);
memset(huff->huffman_table[0].pad, 0, sizeof(huff->huffman_table[0].pad));
huff->load_huffman_table[1] = 1;
vaapi_encode_mjpeg_copy_huffman(huff->huffman_table[1].num_dc_codes,
huff->huffman_table[1].dc_values,
avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc);
vaapi_encode_mjpeg_copy_huffman(huff->huffman_table[1].num_ac_codes,
huff->huffman_table[1].ac_values,
avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance);
memset(huff->huffman_table[1].pad, 0, sizeof(huff->huffman_table[1].pad));
}
static void vaapi_encode_mjpeg_write_marker(PutBitContext *pbc, int marker)
{
put_bits(pbc, 8, 0xff);
put_bits(pbc, 8, marker);
}
static int vaapi_encode_mjpeg_write_image_header(AVCodecContext *avctx,
VAAPIEncodePicture *pic,
VAAPIEncodeSlice *slice,
char *data, size_t *data_len)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAEncPictureParameterBufferJPEG *vpic = pic->codec_picture_params;
VAEncSliceParameterBufferJPEG *vslice = slice->codec_slice_params;
VAAPIEncodeMJPEGContext *priv = ctx->priv_data;
PutBitContext pbc;
int t, i, quant_scale;
init_put_bits(&pbc, data, *data_len);
vaapi_encode_mjpeg_write_marker(&pbc, SOI);
// Quantisation table coefficients are scaled for quality by the driver,
// so we also need to do it ourselves here so that headers match.
if (priv->quality < 50)
quant_scale = 5000 / priv->quality;
else
quant_scale = 200 - 2 * priv->quality;
for (t = 0; t < 2; t++) {
int q;
vaapi_encode_mjpeg_write_marker(&pbc, DQT);
put_bits(&pbc, 16, 3 + 64); // Lq
put_bits(&pbc, 4, 0); // Pq
put_bits(&pbc, 4, t); // Tq
for (i = 0; i < 64; i++) {
q = i[t ? priv->quant_tables.chroma_quantiser_matrix
: priv->quant_tables.lum_quantiser_matrix];
q = (q * quant_scale) / 100;
if (q < 1) q = 1;
if (q > 255) q = 255;
put_bits(&pbc, 8, q);
}
}
vaapi_encode_mjpeg_write_marker(&pbc, SOF0);
put_bits(&pbc, 16, 8 + 3 * vpic->num_components); // Lf
put_bits(&pbc, 8, vpic->sample_bit_depth); // P
put_bits(&pbc, 16, vpic->picture_height); // Y
put_bits(&pbc, 16, vpic->picture_width); // X
put_bits(&pbc, 8, vpic->num_components); // Nf
for (i = 0; i < vpic->num_components; i++) {
put_bits(&pbc, 8, vpic->component_id[i]); // Ci
put_bits(&pbc, 4, priv->component_subsample_h[i]); // Hi
put_bits(&pbc, 4, priv->component_subsample_v[i]); // Vi
put_bits(&pbc, 8, vpic->quantiser_table_selector[i]); // Tqi
}
for (t = 0; t < 4; t++) {
int mt;
unsigned char *lengths, *values;
vaapi_encode_mjpeg_write_marker(&pbc, DHT);
if ((t & 1) == 0) {
lengths = priv->huffman_tables.huffman_table[t / 2].num_dc_codes;
values = priv->huffman_tables.huffman_table[t / 2].dc_values;
} else {
lengths = priv->huffman_tables.huffman_table[t / 2].num_ac_codes;
values = priv->huffman_tables.huffman_table[t / 2].ac_values;
}
mt = 0;
for (i = 0; i < 16; i++)
mt += lengths[i];
put_bits(&pbc, 16, 2 + 17 + mt); // Lh
put_bits(&pbc, 4, t & 1); // Tc
put_bits(&pbc, 4, t / 2); // Th
for (i = 0; i < 16; i++)
put_bits(&pbc, 8, lengths[i]);
for (i = 0; i < mt; i++)
put_bits(&pbc, 8, values[i]);
}
vaapi_encode_mjpeg_write_marker(&pbc, SOS);
av_assert0(vpic->num_components == vslice->num_components);
put_bits(&pbc, 16, 6 + 2 * vslice->num_components); // Ls
put_bits(&pbc, 8, vslice->num_components); // Ns
for (i = 0; i < vslice->num_components; i++) {
put_bits(&pbc, 8, vslice->components[i].component_selector); // Csj
put_bits(&pbc, 4, vslice->components[i].dc_table_selector); // Tdj
put_bits(&pbc, 4, vslice->components[i].ac_table_selector); // Taj
}
put_bits(&pbc, 8, 0); // Ss
put_bits(&pbc, 8, 63); // Se
put_bits(&pbc, 4, 0); // Ah
put_bits(&pbc, 4, 0); // Al
*data_len = put_bits_count(&pbc);
flush_put_bits(&pbc);
return 0;
}
static int vaapi_encode_mjpeg_write_extra_buffer(AVCodecContext *avctx,
VAAPIEncodePicture *pic,
int index, int *type,
char *data, size_t *data_len)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAAPIEncodeMJPEGContext *priv = ctx->priv_data;
if (index == 0) {
// Write quantisation tables.
if (*data_len < sizeof(priv->quant_tables))
return AVERROR(EINVAL);
*type = VAQMatrixBufferType;
memcpy(data, &priv->quant_tables,
*data_len = sizeof(priv->quant_tables));
} else if (index == 1) {
// Write huffman tables.
if (*data_len < sizeof(priv->huffman_tables))
return AVERROR(EINVAL);
*type = VAHuffmanTableBufferType;
memcpy(data, &priv->huffman_tables,
*data_len = sizeof(priv->huffman_tables));
} else {
return AVERROR_EOF;
}
return 0;
}
static int vaapi_encode_mjpeg_init_picture_params(AVCodecContext *avctx,
VAAPIEncodePicture *pic)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAEncPictureParameterBufferJPEG *vpic = pic->codec_picture_params;
VAAPIEncodeMJPEGContext *priv = ctx->priv_data;
vpic->reconstructed_picture = pic->recon_surface;
vpic->coded_buf = pic->output_buffer;
vpic->picture_width = avctx->width;
vpic->picture_height = avctx->height;
vpic->pic_flags.bits.profile = 0;
vpic->pic_flags.bits.progressive = 0;
vpic->pic_flags.bits.huffman = 1;
vpic->pic_flags.bits.interleaved = 0;
vpic->pic_flags.bits.differential = 0;
vpic->sample_bit_depth = 8;
vpic->num_scan = 1;
vpic->num_components = 3;
vpic->component_id[0] = 1;
vpic->component_id[1] = 2;
vpic->component_id[2] = 3;
priv->component_subsample_h[0] = 2;
priv->component_subsample_v[0] = 2;
priv->component_subsample_h[1] = 1;
priv->component_subsample_v[1] = 1;
priv->component_subsample_h[2] = 1;
priv->component_subsample_v[2] = 1;
vpic->quantiser_table_selector[0] = 0;
vpic->quantiser_table_selector[1] = 1;
vpic->quantiser_table_selector[2] = 1;
vpic->quality = priv->quality;
pic->nb_slices = 1;
return 0;
}
static int vaapi_encode_mjpeg_init_slice_params(AVCodecContext *avctx,
VAAPIEncodePicture *pic,
VAAPIEncodeSlice *slice)
{
VAEncPictureParameterBufferJPEG *vpic = pic->codec_picture_params;
VAEncSliceParameterBufferJPEG *vslice = slice->codec_slice_params;
int i;
vslice->restart_interval = 0;
vslice->num_components = vpic->num_components;
for (i = 0; i < vslice->num_components; i++) {
vslice->components[i].component_selector = i + 1;
vslice->components[i].dc_table_selector = (i > 0);
vslice->components[i].ac_table_selector = (i > 0);
}
return 0;
}
static av_cold int vaapi_encode_mjpeg_configure(AVCodecContext *avctx)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAAPIEncodeMJPEGContext *priv = ctx->priv_data;
priv->quality = avctx->global_quality;
if (priv->quality < 1 || priv->quality > 100) {
av_log(avctx, AV_LOG_ERROR, "Invalid quality value %d "
"(must be 1-100).\n", priv->quality);
return AVERROR(EINVAL);
}
vaapi_encode_mjpeg_init_tables(avctx);
return 0;
}
static VAAPIEncodeType vaapi_encode_type_mjpeg = {
.priv_data_size = sizeof(VAAPIEncodeMJPEGContext),
.configure = &vaapi_encode_mjpeg_configure,
.picture_params_size = sizeof(VAEncPictureParameterBufferJPEG),
.init_picture_params = &vaapi_encode_mjpeg_init_picture_params,
.slice_params_size = sizeof(VAEncSliceParameterBufferJPEG),
.init_slice_params = &vaapi_encode_mjpeg_init_slice_params,
.slice_header_type = VAEncPackedHeaderRawData,
.write_slice_header = &vaapi_encode_mjpeg_write_image_header,
.write_extra_buffer = &vaapi_encode_mjpeg_write_extra_buffer,
};
static av_cold int vaapi_encode_mjpeg_init(AVCodecContext *avctx)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
ctx->codec = &vaapi_encode_type_mjpeg;
ctx->va_profile = VAProfileJPEGBaseline;
ctx->va_entrypoint = VAEntrypointEncPicture;
ctx->va_rt_format = VA_RT_FORMAT_YUV420;
ctx->va_rc_mode = VA_RC_CQP;
ctx->surface_width = FFALIGN(avctx->width, 8);
ctx->surface_height = FFALIGN(avctx->height, 8);
return ff_vaapi_encode_init(avctx);
}
static const AVCodecDefault vaapi_encode_mjpeg_defaults[] = {
{ "global_quality", "80" },
{ NULL },
};
static const AVClass vaapi_encode_mjpeg_class = {
.class_name = "mjpeg_vaapi",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_mjpeg_vaapi_encoder = {
.name = "mjpeg_vaapi",
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (VAAPI)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MJPEG,
.priv_data_size = sizeof(VAAPIEncodeContext),
.init = &vaapi_encode_mjpeg_init,
.encode2 = &ff_vaapi_encode2,
.close = &ff_vaapi_encode_close,
.priv_class = &vaapi_encode_mjpeg_class,
.defaults = vaapi_encode_mjpeg_defaults,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_VAAPI,
AV_PIX_FMT_NONE,
},
};
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