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mpeg2: minor clean-ups.

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Drop explicit initialization of most fields that are implicitly set to
zero. Remove some useless checks for NULL pointers.
This commit is contained in:
Gwenole Beauchesne 2013-01-02 14:45:50 +01:00
parent 7ca43932e5
commit 4556b1fd47
1 changed files with 103 additions and 108 deletions
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211
gst-libs/gst/vaapi/gstvaapidecoder_mpeg2.c
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@ -38,14 +38,9 @@
#define DEBUG 1
#include "gstvaapidebug.h"
G_DEFINE_TYPE(GstVaapiDecoderMpeg2,
gst_vaapi_decoder_mpeg2,
GST_VAAPI_TYPE_DECODER)
#define GST_VAAPI_DECODER_MPEG2_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE((obj), \
GST_VAAPI_TYPE_DECODER_MPEG2, \
GstVaapiDecoderMpeg2Private))
/* ------------------------------------------------------------------------- */
/* --- VLC Reader --- */
/* ------------------------------------------------------------------------- */
#define READ_UINT8(br, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint8 (br, &val, nbits)) { \
@ -61,6 +56,85 @@ G_DEFINE_TYPE(GstVaapiDecoderMpeg2,
} \
} G_STMT_END
/* VLC decoder from gst-plugins-bad */
typedef struct _VLCTable VLCTable;
struct _VLCTable {
gint value;
guint cword;
guint cbits;
};
static gboolean
decode_vlc(GstBitReader *br, gint *res, const VLCTable *table, guint length)
{
guint8 i;
guint cbits = 0;
guint32 value = 0;
for (i = 0; i < length; i++) {
if (cbits != table[i].cbits) {
cbits = table[i].cbits;
if (!gst_bit_reader_peek_bits_uint32(br, &value, cbits)) {
goto failed;
}
}
if (value == table[i].cword) {
SKIP(br, cbits);
if (res)
*res = table[i].value;
return TRUE;
}
}
GST_DEBUG("failed to find VLC code");
failed:
GST_WARNING("failed to decode VLC, returning");
return FALSE;
}
enum {
GST_MPEG_VIDEO_MACROBLOCK_ESCAPE = -1,
};
/* Table B-1: Variable length codes for macroblock_address_increment */
static const VLCTable mpeg2_mbaddr_vlc_table[] = {
{ 1, 0x01, 1 },
{ 2, 0x03, 3 },
{ 3, 0x02, 3 },
{ 4, 0x03, 4 },
{ 5, 0x02, 4 },
{ 6, 0x03, 5 },
{ 7, 0x02, 5 },
{ 8, 0x07, 7 },
{ 9, 0x06, 7 },
{ 10, 0x0b, 8 },
{ 11, 0x0a, 8 },
{ 12, 0x09, 8 },
{ 13, 0x08, 8 },
{ 14, 0x07, 8 },
{ 15, 0x06, 8 },
{ 16, 0x17, 10 },
{ 17, 0x16, 10 },
{ 18, 0x15, 10 },
{ 19, 0x14, 10 },
{ 20, 0x13, 10 },
{ 21, 0x12, 10 },
{ 22, 0x23, 11 },
{ 23, 0x22, 11 },
{ 24, 0x21, 11 },
{ 25, 0x20, 11 },
{ 26, 0x1f, 11 },
{ 27, 0x1e, 11 },
{ 28, 0x1d, 11 },
{ 29, 0x1c, 11 },
{ 30, 0x1b, 11 },
{ 31, 0x1a, 11 },
{ 32, 0x19, 11 },
{ 33, 0x18, 11 },
{ GST_MPEG_VIDEO_MACROBLOCK_ESCAPE, 0x08, 11 }
};
/* ------------------------------------------------------------------------- */
/* --- PTS Generator --- */
/* ------------------------------------------------------------------------- */
@ -222,6 +296,18 @@ gst_vaapi_decoder_unit_mpeg2_new(guint size)
/* --- MPEG-2 Decoder --- */
/* ------------------------------------------------------------------------- */
G_DEFINE_TYPE(GstVaapiDecoderMpeg2,
gst_vaapi_decoder_mpeg2,
GST_VAAPI_TYPE_DECODER)
#define GST_VAAPI_DECODER_MPEG2_CAST(decoder) \
((GstVaapiDecoderMpeg2 *)(decoder))
#define GST_VAAPI_DECODER_MPEG2_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE((obj), \
GST_VAAPI_TYPE_DECODER_MPEG2, \
GstVaapiDecoderMpeg2Private))
struct _GstVaapiDecoderMpeg2Private {
GstVaapiProfile profile;
GstVaapiProfile hw_profile;
@ -249,85 +335,6 @@ struct _GstVaapiDecoderMpeg2Private {
guint broken_link : 1;
};
/* VLC decoder from gst-plugins-bad */
typedef struct _VLCTable VLCTable;
struct _VLCTable {
gint value;
guint cword;
guint cbits;
};
static gboolean
decode_vlc(GstBitReader *br, gint *res, const VLCTable *table, guint length)
{
guint8 i;
guint cbits = 0;
guint32 value = 0;
for (i = 0; i < length; i++) {
if (cbits != table[i].cbits) {
cbits = table[i].cbits;
if (!gst_bit_reader_peek_bits_uint32(br, &value, cbits)) {
goto failed;
}
}
if (value == table[i].cword) {
SKIP(br, cbits);
if (res)
*res = table[i].value;
return TRUE;
}
}
GST_DEBUG("failed to find VLC code");
failed:
GST_WARNING("failed to decode VLC, returning");
return FALSE;
}
enum {
GST_MPEG_VIDEO_MACROBLOCK_ESCAPE = -1,
};
/* Table B-1: Variable length codes for macroblock_address_increment */
static const VLCTable mpeg2_mbaddr_vlc_table[] = {
{ 1, 0x01, 1 },
{ 2, 0x03, 3 },
{ 3, 0x02, 3 },
{ 4, 0x03, 4 },
{ 5, 0x02, 4 },
{ 6, 0x03, 5 },
{ 7, 0x02, 5 },
{ 8, 0x07, 7 },
{ 9, 0x06, 7 },
{ 10, 0x0b, 8 },
{ 11, 0x0a, 8 },
{ 12, 0x09, 8 },
{ 13, 0x08, 8 },
{ 14, 0x07, 8 },
{ 15, 0x06, 8 },
{ 16, 0x17, 10 },
{ 17, 0x16, 10 },
{ 18, 0x15, 10 },
{ 19, 0x14, 10 },
{ 20, 0x13, 10 },
{ 21, 0x12, 10 },
{ 22, 0x23, 11 },
{ 23, 0x22, 11 },
{ 24, 0x21, 11 },
{ 25, 0x20, 11 },
{ 26, 0x1f, 11 },
{ 27, 0x1e, 11 },
{ 28, 0x1d, 11 },
{ 29, 0x1c, 11 },
{ 30, 0x1b, 11 },
{ 31, 0x1a, 11 },
{ 32, 0x19, 11 },
{ 33, 0x18, 11 },
{ GST_MPEG_VIDEO_MACROBLOCK_ESCAPE, 0x08, 11 }
};
static void
gst_vaapi_decoder_mpeg2_close(GstVaapiDecoderMpeg2 *decoder)
{
@ -472,7 +479,7 @@ ensure_context(GstVaapiDecoderMpeg2 *decoder)
info.height = priv->height;
info.ref_frames = 2;
reset_context = gst_vaapi_decoder_ensure_context(
GST_VAAPI_DECODER(decoder),
GST_VAAPI_DECODER_CAST(decoder),
&info
);
if (!reset_context)
@ -582,7 +589,7 @@ parse_sequence(GstVaapiDecoderUnitMpeg2 *unit)
static GstVaapiDecoderStatus
decode_sequence(GstVaapiDecoderMpeg2 *decoder, GstVaapiDecoderUnitMpeg2 *unit)
{
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER(decoder);
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER_CAST(decoder);
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GstMpegVideoSequenceHdr *seq_hdr;
@ -621,7 +628,7 @@ static GstVaapiDecoderStatus
decode_sequence_ext(GstVaapiDecoderMpeg2 *decoder,
GstVaapiDecoderUnitMpeg2 *unit)
{
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER(decoder);
GstVaapiDecoder * const base_decoder = GST_VAAPI_DECODER_CAST(decoder);
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GstMpegVideoSequenceExt *seq_ext;
GstVaapiProfile profile;
@ -1159,7 +1166,7 @@ gst_vaapi_decoder_mpeg2_parse(GstVaapiDecoder *base_decoder,
GstAdapter *adapter, gboolean at_eos, GstVaapiDecoderUnit **unit_ptr)
{
GstVaapiDecoderMpeg2 * const decoder =
GST_VAAPI_DECODER_MPEG2(base_decoder);
GST_VAAPI_DECODER_MPEG2_CAST(base_decoder);
GstVaapiParserState * const ps = GST_VAAPI_PARSER_STATE(base_decoder);
GstVaapiDecoderUnitMpeg2 *unit;
GstVaapiDecoderStatus status;
@ -1302,7 +1309,7 @@ gst_vaapi_decoder_mpeg2_decode(GstVaapiDecoder *base_decoder,
GstVaapiDecoderUnit *unit)
{
GstVaapiDecoderMpeg2 * const decoder =
GST_VAAPI_DECODER_MPEG2(base_decoder);
GST_VAAPI_DECODER_MPEG2_CAST(base_decoder);
GstVaapiDecoderStatus status;
status = ensure_decoder(decoder);
@ -1316,7 +1323,7 @@ gst_vaapi_decoder_mpeg2_start_frame(GstVaapiDecoder *base_decoder,
GstVaapiDecoderUnit *base_unit)
{
GstVaapiDecoderMpeg2 * const decoder =
GST_VAAPI_DECODER_MPEG2(base_decoder);
GST_VAAPI_DECODER_MPEG2_CAST(base_decoder);
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GstMpegVideoSequenceHdr *seq_hdr;
GstMpegVideoSequenceExt *seq_ext;
@ -1383,7 +1390,7 @@ static GstVaapiDecoderStatus
gst_vaapi_decoder_mpeg2_end_frame(GstVaapiDecoder *base_decoder)
{
GstVaapiDecoderMpeg2 * const decoder =
GST_VAAPI_DECODER_MPEG2(base_decoder);
GST_VAAPI_DECODER_MPEG2_CAST(base_decoder);
return decode_current_picture(decoder);
}
@ -1391,7 +1398,7 @@ gst_vaapi_decoder_mpeg2_end_frame(GstVaapiDecoder *base_decoder)
static void
gst_vaapi_decoder_mpeg2_finalize(GObject *object)
{
GstVaapiDecoderMpeg2 * const decoder = GST_VAAPI_DECODER_MPEG2(object);
GstVaapiDecoderMpeg2 * const decoder = GST_VAAPI_DECODER_MPEG2_CAST(object);
gst_vaapi_decoder_mpeg2_destroy(decoder);
@ -1401,7 +1408,7 @@ gst_vaapi_decoder_mpeg2_finalize(GObject *object)
static void
gst_vaapi_decoder_mpeg2_constructed(GObject *object)
{
GstVaapiDecoderMpeg2 * const decoder = GST_VAAPI_DECODER_MPEG2(object);
GstVaapiDecoderMpeg2 * const decoder = GST_VAAPI_DECODER_MPEG2_CAST(object);
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GObjectClass *parent_class;
@ -1436,21 +1443,9 @@ gst_vaapi_decoder_mpeg2_init(GstVaapiDecoderMpeg2 *decoder)
priv = GST_VAAPI_DECODER_MPEG2_GET_PRIVATE(decoder);
decoder->priv = priv;
priv->width = 0;
priv->height = 0;
priv->fps_n = 0;
priv->fps_d = 0;
priv->hw_profile = GST_VAAPI_PROFILE_UNKNOWN;
priv->profile = GST_VAAPI_PROFILE_MPEG2_SIMPLE;
priv->current_picture = NULL;
priv->is_constructed = FALSE;
priv->is_opened = FALSE;
priv->size_changed = FALSE;
priv->profile_changed = TRUE; /* Allow fallbacks to work */
priv->quant_matrix_changed = FALSE;
priv->progressive_sequence = FALSE;
priv->closed_gop = FALSE;
priv->broken_link = FALSE;
}
/**