gstreamer/gst-libs/gst/vaapi/gstvaapidecoder_jpeg.c

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/*
* gstvaapidecoder_jpeg.c - JPEG decoder
*
* Copyright (C) 2011-2013 Intel Corporation
* Author: Wind Yuan <feng.yuan@intel.com>
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.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
*/
/**
* SECTION:gstvaapidecoder_jpeg
* @short_description: JPEG decoder
*/
#include "sysdeps.h"
#include <gst/codecparsers/gstjpegparser.h>
#include "gstvaapicompat.h"
#include "gstvaapidecoder_jpeg.h"
#include "gstvaapidecoder_objects.h"
#include "gstvaapidecoder_priv.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapiobject_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
#define GST_VAAPI_DECODER_JPEG_CAST(decoder) \
((GstVaapiDecoderJpeg *)(decoder))
typedef struct _GstVaapiDecoderJpegPrivate GstVaapiDecoderJpegPrivate;
typedef struct _GstVaapiDecoderJpegClass GstVaapiDecoderJpegClass;
typedef enum
{
GST_JPEG_VIDEO_STATE_GOT_SOI = 1 << 0,
GST_JPEG_VIDEO_STATE_GOT_SOF = 1 << 1,
GST_JPEG_VIDEO_STATE_GOT_SOS = 1 << 2,
GST_JPEG_VIDEO_STATE_GOT_HUF_TABLE = 1 << 3,
GST_JPEG_VIDEO_STATE_GOT_IQ_TABLE = 1 << 4,
GST_JPEG_VIDEO_STATE_VALID_PICTURE = (GST_JPEG_VIDEO_STATE_GOT_SOI |
GST_JPEG_VIDEO_STATE_GOT_SOF | GST_JPEG_VIDEO_STATE_GOT_SOS),
} GstJpegVideoState;
struct _GstVaapiDecoderJpegPrivate
{
GstVaapiProfile profile;
guint width;
guint height;
GstVaapiPicture *current_picture;
GstJpegFrameHdr frame_hdr;
GstJpegHuffmanTables huf_tables;
GstJpegQuantTables quant_tables;
guint mcu_restart;
guint parser_state;
guint decoder_state;
guint is_opened:1;
guint profile_changed:1;
guint size_changed:1;
};
/**
* GstVaapiDecoderJpeg:
*
* A decoder based on Jpeg.
*/
struct _GstVaapiDecoderJpeg
{
/*< private > */
GstVaapiDecoder parent_instance;
GstVaapiDecoderJpegPrivate priv;
};
/**
* GstVaapiDecoderJpegClass:
*
* A decoder class based on Jpeg.
*/
struct _GstVaapiDecoderJpegClass
{
/*< private > */
GstVaapiDecoderClass parent_class;
};
G_DEFINE_TYPE (GstVaapiDecoderJpeg, gst_vaapi_decoder_jpeg,
GST_TYPE_VAAPI_DECODER);
static inline void
unit_set_marker_code (GstVaapiDecoderUnit * unit, GstJpegMarker marker)
{
unit->parsed_info = GSIZE_TO_POINTER (marker);
}
static inline GstJpegMarker
unit_get_marker_code (GstVaapiDecoderUnit * unit)
{
return GPOINTER_TO_SIZE (unit->parsed_info);
}
static void
gst_vaapi_decoder_jpeg_close (GstVaapiDecoderJpeg * decoder)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
gst_vaapi_picture_replace (&priv->current_picture, NULL);
/* Reset all */
priv->profile = GST_VAAPI_PROFILE_JPEG_BASELINE;
priv->width = 0;
priv->height = 0;
priv->is_opened = FALSE;
priv->profile_changed = TRUE;
priv->size_changed = TRUE;
}
static gboolean
gst_vaapi_decoder_jpeg_open (GstVaapiDecoderJpeg * decoder)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
gst_vaapi_decoder_jpeg_close (decoder);
priv->parser_state = 0;
priv->decoder_state = 0;
return TRUE;
}
static void
gst_vaapi_decoder_jpeg_destroy (GstVaapiDecoder * base_decoder)
{
GstVaapiDecoderJpeg *const decoder =
GST_VAAPI_DECODER_JPEG_CAST (base_decoder);
gst_vaapi_decoder_jpeg_close (decoder);
}
static gboolean
gst_vaapi_decoder_jpeg_create (GstVaapiDecoder * base_decoder)
{
GstVaapiDecoderJpeg *const decoder =
GST_VAAPI_DECODER_JPEG_CAST (base_decoder);
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
priv->profile = GST_VAAPI_PROFILE_JPEG_BASELINE;
priv->profile_changed = TRUE;
priv->size_changed = TRUE;
return TRUE;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_jpeg_reset (GstVaapiDecoder * base_decoder)
{
gst_vaapi_decoder_jpeg_destroy (base_decoder);
gst_vaapi_decoder_jpeg_create (base_decoder);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
ensure_context (GstVaapiDecoderJpeg * decoder)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstVaapiProfile profiles[2];
GstVaapiEntrypoint entrypoint = GST_VAAPI_ENTRYPOINT_VLD;
guint i, n_profiles = 0;
gboolean reset_context = FALSE;
if (priv->profile_changed) {
GST_DEBUG ("profile changed");
priv->profile_changed = FALSE;
reset_context = TRUE;
profiles[n_profiles++] = priv->profile;
//if (priv->profile == GST_VAAPI_PROFILE_JPEG_EXTENDED)
// profiles[n_profiles++] = GST_VAAPI_PROFILE_JPEG_BASELINE;
for (i = 0; i < n_profiles; i++) {
if (gst_vaapi_display_has_decoder (GST_VAAPI_DECODER_DISPLAY (decoder),
profiles[i], entrypoint))
break;
}
if (i == n_profiles)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
priv->profile = profiles[i];
}
if (priv->size_changed) {
GST_DEBUG ("size changed");
priv->size_changed = FALSE;
reset_context = TRUE;
}
if (reset_context) {
GstVaapiContextInfo info;
info.profile = priv->profile;
info.entrypoint = entrypoint;
info.chroma_type = GST_VAAPI_CHROMA_TYPE_YUV420;
info.width = priv->width;
info.height = priv->height;
info.ref_frames = 2;
reset_context =
gst_vaapi_decoder_ensure_context (GST_VAAPI_DECODER (decoder), &info);
if (!reset_context)
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static inline gboolean
is_valid_state (guint state, guint ref_state)
{
return (state & ref_state) == ref_state;
}
#define VALID_STATE(TYPE, STATE) \
is_valid_state(priv->G_PASTE(TYPE,_state), \
G_PASTE(GST_JPEG_VIDEO_STATE_,STATE))
static GstVaapiDecoderStatus
decode_current_picture (GstVaapiDecoderJpeg * decoder)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstVaapiPicture *const picture = priv->current_picture;
if (!VALID_STATE (decoder, VALID_PICTURE))
goto drop_frame;
priv->decoder_state = 0;
if (!picture)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
if (!gst_vaapi_picture_decode (picture))
goto error;
if (!gst_vaapi_picture_output (picture))
goto error;
gst_vaapi_picture_replace (&priv->current_picture, NULL);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
2016-10-19 17:04:20 +00:00
/* ERRORS */
error:
2016-10-19 17:04:20 +00:00
{
gst_vaapi_picture_replace (&priv->current_picture, NULL);
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
drop_frame:
2016-10-19 17:04:20 +00:00
{
priv->decoder_state = 0;
return (GstVaapiDecoderStatus) GST_VAAPI_DECODER_STATUS_DROP_FRAME;
}
}
static gboolean
fill_picture (GstVaapiDecoderJpeg * decoder,
GstVaapiPicture * picture, GstJpegFrameHdr * frame_hdr)
{
VAPictureParameterBufferJPEGBaseline *const pic_param = picture->param;
guint i;
memset (pic_param, 0, sizeof (VAPictureParameterBufferJPEGBaseline));
pic_param->picture_width = frame_hdr->width;
pic_param->picture_height = frame_hdr->height;
pic_param->num_components = frame_hdr->num_components;
if (frame_hdr->num_components > 4)
return FALSE;
for (i = 0; i < pic_param->num_components; i++) {
pic_param->components[i].component_id = frame_hdr->components[i].identifier;
pic_param->components[i].h_sampling_factor =
frame_hdr->components[i].horizontal_factor;
pic_param->components[i].v_sampling_factor =
frame_hdr->components[i].vertical_factor;
pic_param->components[i].quantiser_table_selector =
frame_hdr->components[i].quant_table_selector;
}
return TRUE;
}
static GstVaapiDecoderStatus
fill_quantization_table (GstVaapiDecoderJpeg * decoder,
GstVaapiPicture * picture)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
VAIQMatrixBufferJPEGBaseline *iq_matrix;
guint i, j, num_tables;
if (!VALID_STATE (decoder, GOT_IQ_TABLE))
gst_jpeg_get_default_quantization_tables (&priv->quant_tables);
picture->iq_matrix = GST_VAAPI_IQ_MATRIX_NEW (JPEGBaseline, decoder);
if (!picture->iq_matrix) {
GST_ERROR ("failed to allocate quantiser table");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
iq_matrix = picture->iq_matrix->param;
num_tables = MIN (G_N_ELEMENTS (iq_matrix->quantiser_table),
GST_JPEG_MAX_QUANT_ELEMENTS);
for (i = 0; i < num_tables; i++) {
GstJpegQuantTable *const quant_table = &priv->quant_tables.quant_tables[i];
iq_matrix->load_quantiser_table[i] = quant_table->valid;
if (!iq_matrix->load_quantiser_table[i])
continue;
if (quant_table->quant_precision != 0) {
// Only Baseline profile is supported, thus 8-bit Qk values
GST_ERROR ("unsupported quantization table element precision");
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT;
}
for (j = 0; j < GST_JPEG_MAX_QUANT_ELEMENTS; j++)
iq_matrix->quantiser_table[i][j] = quant_table->quant_table[j];
iq_matrix->load_quantiser_table[i] = 1;
quant_table->valid = FALSE;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static gboolean
huffman_tables_updated (const GstJpegHuffmanTables * huf_tables)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (huf_tables->dc_tables); i++)
if (huf_tables->dc_tables[i].valid)
return TRUE;
for (i = 0; i < G_N_ELEMENTS (huf_tables->ac_tables); i++)
if (huf_tables->ac_tables[i].valid)
return TRUE;
return FALSE;
}
static void
huffman_tables_reset (GstJpegHuffmanTables * huf_tables)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (huf_tables->dc_tables); i++)
huf_tables->dc_tables[i].valid = FALSE;
for (i = 0; i < G_N_ELEMENTS (huf_tables->ac_tables); i++)
huf_tables->ac_tables[i].valid = FALSE;
}
static void
fill_huffman_table (GstVaapiHuffmanTable * huf_table,
const GstJpegHuffmanTables * huf_tables)
{
VAHuffmanTableBufferJPEGBaseline *const huffman_table = huf_table->param;
guint i, num_tables;
num_tables = MIN (G_N_ELEMENTS (huffman_table->huffman_table),
GST_JPEG_MAX_SCAN_COMPONENTS);
for (i = 0; i < num_tables; i++) {
huffman_table->load_huffman_table[i] =
huf_tables->dc_tables[i].valid && huf_tables->ac_tables[i].valid;
if (!huffman_table->load_huffman_table[i])
continue;
memcpy (huffman_table->huffman_table[i].num_dc_codes,
huf_tables->dc_tables[i].huf_bits,
sizeof (huffman_table->huffman_table[i].num_dc_codes));
memcpy (huffman_table->huffman_table[i].dc_values,
huf_tables->dc_tables[i].huf_values,
sizeof (huffman_table->huffman_table[i].dc_values));
memcpy (huffman_table->huffman_table[i].num_ac_codes,
huf_tables->ac_tables[i].huf_bits,
sizeof (huffman_table->huffman_table[i].num_ac_codes));
memcpy (huffman_table->huffman_table[i].ac_values,
huf_tables->ac_tables[i].huf_values,
sizeof (huffman_table->huffman_table[i].ac_values));
memset (huffman_table->huffman_table[i].pad,
0, sizeof (huffman_table->huffman_table[i].pad));
}
}
static void
get_max_sampling_factors (const GstJpegFrameHdr * frame_hdr,
guint * h_max_ptr, guint * v_max_ptr)
{
guint h_max = frame_hdr->components[0].horizontal_factor;
guint v_max = frame_hdr->components[0].vertical_factor;
guint i;
for (i = 1; i < frame_hdr->num_components; i++) {
const GstJpegFrameComponent *const fcp = &frame_hdr->components[i];
if (h_max < fcp->horizontal_factor)
h_max = fcp->horizontal_factor;
if (v_max < fcp->vertical_factor)
v_max = fcp->vertical_factor;
}
if (h_max_ptr)
*h_max_ptr = h_max;
if (v_max_ptr)
*v_max_ptr = v_max;
}
static const GstJpegFrameComponent *
get_component (const GstJpegFrameHdr * frame_hdr, guint selector)
{
guint i;
for (i = 0; i < frame_hdr->num_components; i++) {
const GstJpegFrameComponent *const fcp = &frame_hdr->components[i];
if (fcp->identifier == selector)
return fcp;
}
return NULL;
}
static GstVaapiDecoderStatus
decode_picture (GstVaapiDecoderJpeg * decoder, GstJpegSegment * seg)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstJpegFrameHdr *const frame_hdr = &priv->frame_hdr;
if (!VALID_STATE (decoder, GOT_SOI))
return GST_VAAPI_DECODER_STATUS_SUCCESS;
switch (seg->marker) {
case GST_JPEG_MARKER_SOF_MIN:
priv->profile = GST_VAAPI_PROFILE_JPEG_BASELINE;
break;
default:
GST_ERROR ("unsupported profile %d", seg->marker);
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
}
memset (frame_hdr, 0, sizeof (*frame_hdr));
if (!gst_jpeg_segment_parse_frame_header (seg, frame_hdr)) {
GST_ERROR ("failed to parse image");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
if (priv->height != frame_hdr->height || priv->width != frame_hdr->width)
priv->size_changed = TRUE;
priv->height = frame_hdr->height;
priv->width = frame_hdr->width;
priv->decoder_state |= GST_JPEG_VIDEO_STATE_GOT_SOF;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_huffman_table (GstVaapiDecoderJpeg * decoder, GstJpegSegment * seg)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
if (!VALID_STATE (decoder, GOT_SOI))
return GST_VAAPI_DECODER_STATUS_SUCCESS;
if (!gst_jpeg_segment_parse_huffman_table (seg, &priv->huf_tables)) {
GST_ERROR ("failed to parse Huffman table");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
priv->decoder_state |= GST_JPEG_VIDEO_STATE_GOT_HUF_TABLE;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_quant_table (GstVaapiDecoderJpeg * decoder, GstJpegSegment * seg)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
if (!VALID_STATE (decoder, GOT_SOI))
return GST_VAAPI_DECODER_STATUS_SUCCESS;
if (!gst_jpeg_segment_parse_quantization_table (seg, &priv->quant_tables)) {
GST_ERROR ("failed to parse quantization table");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
priv->decoder_state |= GST_JPEG_VIDEO_STATE_GOT_IQ_TABLE;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_restart_interval (GstVaapiDecoderJpeg * decoder, GstJpegSegment * seg)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
if (!VALID_STATE (decoder, GOT_SOI))
return GST_VAAPI_DECODER_STATUS_SUCCESS;
if (!gst_jpeg_segment_parse_restart_interval (seg, &priv->mcu_restart)) {
GST_ERROR ("failed to parse restart interval");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_scan (GstVaapiDecoderJpeg * decoder, GstJpegSegment * seg)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstVaapiPicture *const picture = priv->current_picture;
GstVaapiSlice *slice;
VASliceParameterBufferJPEGBaseline *slice_param;
GstJpegScanHdr scan_hdr;
guint scan_hdr_size, scan_data_size;
guint i, h_max, v_max, mcu_width, mcu_height;
if (!VALID_STATE (decoder, GOT_SOF))
return GST_VAAPI_DECODER_STATUS_SUCCESS;
scan_hdr_size = (seg->data[seg->offset] << 8) | seg->data[seg->offset + 1];
scan_data_size = seg->size - scan_hdr_size;
memset (&scan_hdr, 0, sizeof (scan_hdr));
if (!gst_jpeg_segment_parse_scan_header (seg, &scan_hdr)) {
GST_ERROR ("failed to parse scan header");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
slice = GST_VAAPI_SLICE_NEW (JPEGBaseline, decoder,
seg->data + seg->offset + scan_hdr_size, scan_data_size);
if (!slice) {
GST_ERROR ("failed to allocate slice");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
gst_vaapi_picture_add_slice (picture, slice);
if (!VALID_STATE (decoder, GOT_HUF_TABLE))
gst_jpeg_get_default_huffman_tables (&priv->huf_tables);
// Update VA Huffman table if it changed for this scan
if (huffman_tables_updated (&priv->huf_tables)) {
slice->huf_table = GST_VAAPI_HUFFMAN_TABLE_NEW (JPEGBaseline, decoder);
if (!slice->huf_table) {
GST_ERROR ("failed to allocate Huffman tables");
huffman_tables_reset (&priv->huf_tables);
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
fill_huffman_table (slice->huf_table, &priv->huf_tables);
huffman_tables_reset (&priv->huf_tables);
}
slice_param = slice->param;
slice_param->num_components = scan_hdr.num_components;
for (i = 0; i < scan_hdr.num_components; i++) {
slice_param->components[i].component_selector =
scan_hdr.components[i].component_selector;
slice_param->components[i].dc_table_selector =
scan_hdr.components[i].dc_selector;
slice_param->components[i].ac_table_selector =
scan_hdr.components[i].ac_selector;
}
slice_param->restart_interval = priv->mcu_restart;
slice_param->slice_horizontal_position = 0;
slice_param->slice_vertical_position = 0;
get_max_sampling_factors (&priv->frame_hdr, &h_max, &v_max);
mcu_width = 8 * h_max;
mcu_height = 8 * v_max;
if (scan_hdr.num_components == 1) { // Non-interleaved
const guint Csj = slice_param->components[0].component_selector;
const GstJpegFrameComponent *const fcp =
get_component (&priv->frame_hdr, Csj);
if (!fcp || fcp->horizontal_factor == 0 || fcp->vertical_factor == 0) {
GST_ERROR ("failed to validate image component %u", Csj);
return GST_VAAPI_DECODER_STATUS_ERROR_INVALID_PARAMETER;
}
mcu_width /= fcp->horizontal_factor;
mcu_height /= fcp->vertical_factor;
}
slice_param->num_mcus =
((priv->frame_hdr.width + mcu_width - 1) / mcu_width) *
((priv->frame_hdr.height + mcu_height - 1) / mcu_height);
priv->decoder_state |= GST_JPEG_VIDEO_STATE_GOT_SOS;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
decode_segment (GstVaapiDecoderJpeg * decoder, GstJpegSegment * seg)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstVaapiDecoderStatus status;
// Decode segment
status = GST_VAAPI_DECODER_STATUS_SUCCESS;
switch (seg->marker) {
case GST_JPEG_MARKER_SOI:
priv->mcu_restart = 0;
priv->decoder_state |= GST_JPEG_VIDEO_STATE_GOT_SOI;
break;
case GST_JPEG_MARKER_EOI:
priv->decoder_state = 0;
break;
case GST_JPEG_MARKER_DAC:
GST_ERROR ("unsupported arithmetic coding mode");
status = GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
break;
case GST_JPEG_MARKER_DHT:
status = decode_huffman_table (decoder, seg);
break;
case GST_JPEG_MARKER_DQT:
status = decode_quant_table (decoder, seg);
break;
case GST_JPEG_MARKER_DRI:
status = decode_restart_interval (decoder, seg);
break;
case GST_JPEG_MARKER_SOS:
status = decode_scan (decoder, seg);
break;
default:
// SOFn segments
if (seg->marker >= GST_JPEG_MARKER_SOF_MIN &&
seg->marker <= GST_JPEG_MARKER_SOF_MAX)
status = decode_picture (decoder, seg);
break;
}
return status;
}
static GstVaapiDecoderStatus
ensure_decoder (GstVaapiDecoderJpeg * decoder)
{
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
if (!priv->is_opened) {
priv->is_opened = gst_vaapi_decoder_jpeg_open (decoder);
if (!priv->is_opened)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static gboolean
is_scan_complete (GstJpegMarker marker)
{
// Scan is assumed to be complete when the new segment is not RSTi
return marker < GST_JPEG_MARKER_RST_MIN || marker > GST_JPEG_MARKER_RST_MAX;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_jpeg_parse (GstVaapiDecoder * base_decoder,
GstAdapter * adapter, gboolean at_eos, GstVaapiDecoderUnit * unit)
{
GstVaapiDecoderJpeg *const decoder =
GST_VAAPI_DECODER_JPEG_CAST (base_decoder);
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstVaapiParserState *const ps = GST_VAAPI_PARSER_STATE (base_decoder);
GstVaapiDecoderStatus status;
GstJpegMarker marker;
GstJpegSegment seg;
const guchar *buf;
guint buf_size, flags;
gint ofs1, ofs2;
status = ensure_decoder (decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
/* Expect at least 2 bytes for the marker */
buf_size = gst_adapter_available (adapter);
if (buf_size < 2)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
buf = gst_adapter_map (adapter, buf_size);
if (!buf)
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
ofs1 = ps->input_offset1 - 2;
if (ofs1 < 0)
ofs1 = 0;
for (;;) {
// Skip any garbage until we reach SOI, if needed
if (!gst_jpeg_parse (&seg, buf, buf_size, ofs1)) {
gst_adapter_unmap (adapter);
ps->input_offset1 = buf_size;
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
}
ofs1 = seg.offset;
marker = seg.marker;
if (!VALID_STATE (parser, GOT_SOI) && marker != GST_JPEG_MARKER_SOI)
continue;
if (marker == GST_JPEG_MARKER_SOS) {
ofs2 = ps->input_offset2 - 2;
if (ofs2 < ofs1 + seg.size)
ofs2 = ofs1 + seg.size;
// Parse the whole scan + ECSs, including RSTi
for (;;) {
if (!gst_jpeg_parse (&seg, buf, buf_size, ofs2)) {
gst_adapter_unmap (adapter);
ps->input_offset1 = ofs1;
ps->input_offset2 = buf_size;
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
}
if (is_scan_complete (seg.marker))
break;
ofs2 = seg.offset + seg.size;
}
ofs2 = seg.offset - 2;
} else {
// Check that the whole segment is actually available (in buffer)
ofs2 = ofs1 + seg.size;
if (ofs2 > buf_size) {
gst_adapter_unmap (adapter);
ps->input_offset1 = ofs1;
return GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
}
}
break;
}
gst_adapter_unmap (adapter);
unit->size = ofs2 - ofs1;
unit_set_marker_code (unit, marker);
gst_adapter_flush (adapter, ofs1);
ps->input_offset1 = 2;
ps->input_offset2 = 2;
flags = 0;
switch (marker) {
case GST_JPEG_MARKER_SOI:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_FRAME_START;
priv->parser_state |= GST_JPEG_VIDEO_STATE_GOT_SOI;
break;
case GST_JPEG_MARKER_EOI:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_FRAME_END;
priv->parser_state = 0;
break;
case GST_JPEG_MARKER_SOS:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SLICE;
priv->parser_state |= GST_JPEG_VIDEO_STATE_GOT_SOS;
break;
case GST_JPEG_MARKER_DAC:
case GST_JPEG_MARKER_DHT:
case GST_JPEG_MARKER_DQT:
if (priv->parser_state & GST_JPEG_VIDEO_STATE_GOT_SOF)
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SLICE;
break;
case GST_JPEG_MARKER_DRI:
if (priv->parser_state & GST_JPEG_VIDEO_STATE_GOT_SOS)
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SLICE;
break;
case GST_JPEG_MARKER_DNL:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SLICE;
break;
case GST_JPEG_MARKER_COM:
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SKIP;
break;
default:
/* SOFn segments */
if (marker >= GST_JPEG_MARKER_SOF_MIN &&
marker <= GST_JPEG_MARKER_SOF_MAX)
priv->parser_state |= GST_JPEG_VIDEO_STATE_GOT_SOF;
/* Application segments */
else if (marker >= GST_JPEG_MARKER_APP_MIN &&
marker <= GST_JPEG_MARKER_APP_MAX)
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SKIP;
/* Reserved */
else if (marker >= 0x02 && marker <= 0xbf)
flags |= GST_VAAPI_DECODER_UNIT_FLAG_SKIP;
break;
}
GST_VAAPI_DECODER_UNIT_FLAG_SET (unit, flags);
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_jpeg_decode (GstVaapiDecoder * base_decoder,
GstVaapiDecoderUnit * unit)
{
GstVaapiDecoderJpeg *const decoder =
GST_VAAPI_DECODER_JPEG_CAST (base_decoder);
GstVaapiDecoderStatus status;
GstJpegSegment seg;
GstBuffer *const buffer =
GST_VAAPI_DECODER_CODEC_FRAME (decoder)->input_buffer;
GstMapInfo map_info;
status = ensure_decoder (decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
if (!gst_buffer_map (buffer, &map_info, GST_MAP_READ)) {
GST_ERROR ("failed to map buffer");
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
}
seg.marker = unit_get_marker_code (unit);
seg.data = map_info.data;
seg.offset = unit->offset;
seg.size = unit->size;
status = decode_segment (decoder, &seg);
gst_buffer_unmap (buffer, &map_info);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_jpeg_start_frame (GstVaapiDecoder * base_decoder,
GstVaapiDecoderUnit * base_unit)
{
GstVaapiDecoderJpeg *const decoder =
GST_VAAPI_DECODER_JPEG_CAST (base_decoder);
GstVaapiDecoderJpegPrivate *const priv = &decoder->priv;
GstVaapiPicture *picture;
GstVaapiDecoderStatus status;
if (!VALID_STATE (decoder, GOT_SOF))
return GST_VAAPI_DECODER_STATUS_SUCCESS;
status = ensure_context (decoder);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS) {
GST_ERROR ("failed to reset context");
return status;
}
picture = GST_VAAPI_PICTURE_NEW (JPEGBaseline, decoder);
if (!picture) {
GST_ERROR ("failed to allocate picture");
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
}
gst_vaapi_picture_replace (&priv->current_picture, picture);
gst_vaapi_picture_unref (picture);
if (!fill_picture (decoder, picture, &priv->frame_hdr))
return GST_VAAPI_DECODER_STATUS_ERROR_UNKNOWN;
status = fill_quantization_table (decoder, picture);
if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
return status;
/* Update presentation time */
picture->pts = GST_VAAPI_DECODER_CODEC_FRAME (decoder)->pts;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_jpeg_end_frame (GstVaapiDecoder * base_decoder)
{
GstVaapiDecoderJpeg *const decoder =
GST_VAAPI_DECODER_JPEG_CAST (base_decoder);
return decode_current_picture (decoder);
}
static void
gst_vaapi_decoder_jpeg_finalize (GObject * object)
{
GstVaapiDecoder *const base_decoder = GST_VAAPI_DECODER (object);
gst_vaapi_decoder_jpeg_destroy (base_decoder);
G_OBJECT_CLASS (gst_vaapi_decoder_jpeg_parent_class)->finalize (object);
}
static void
gst_vaapi_decoder_jpeg_class_init (GstVaapiDecoderJpegClass * klass)
{
GObjectClass *const object_class = G_OBJECT_CLASS (klass);
GstVaapiDecoderClass *const decoder_class = GST_VAAPI_DECODER_CLASS (klass);
object_class->finalize = gst_vaapi_decoder_jpeg_finalize;
decoder_class->reset = gst_vaapi_decoder_jpeg_reset;
decoder_class->parse = gst_vaapi_decoder_jpeg_parse;
decoder_class->decode = gst_vaapi_decoder_jpeg_decode;
decoder_class->start_frame = gst_vaapi_decoder_jpeg_start_frame;
decoder_class->end_frame = gst_vaapi_decoder_jpeg_end_frame;
}
static void
gst_vaapi_decoder_jpeg_init (GstVaapiDecoderJpeg * decoder)
{
GstVaapiDecoder *const base_decoder = GST_VAAPI_DECODER (decoder);
gst_vaapi_decoder_jpeg_create (base_decoder);
}
/**
* gst_vaapi_decoder_jpeg_new:
* @display: a #GstVaapiDisplay
* @caps: a #GstCaps holding codec information
*
* Creates a new #GstVaapiDecoder for JPEG decoding. The @caps can
* hold extra information like codec-data and pictured coded size.
*
* Return value: the newly allocated #GstVaapiDecoder object
*/
GstVaapiDecoder *
gst_vaapi_decoder_jpeg_new (GstVaapiDisplay * display, GstCaps * caps)
{
return g_object_new (GST_TYPE_VAAPI_DECODER_JPEG, "display", display,
"caps", caps, NULL);
}