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jpeg: handle more libjpeg return values, add some more branch hints

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Also remove unused size variable in _chain().
This commit is contained in:
Stefan Kost 2009-09-28 16:29:45 +03:00
parent 0fac7b5347
commit 69c24fb991
1 changed files with 50 additions and 34 deletions
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84
ext/jpeg/gstjpegdec.c
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@ -518,6 +518,8 @@ add_huff_table (j_decompress_ptr dinfo,
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table ((j_common_ptr) dinfo);
g_assert (*htblptr);
/* Copy the number-of-symbols-of-each-code-length counts */
memcpy ((*htblptr)->bits, bits, sizeof ((*htblptr)->bits));
@ -687,37 +689,42 @@ gst_jpeg_dec_decode_indirect (GstJpegDec * dec, guchar * base[3],
};
guchar **scanarray[3] = { y_rows, u_rows, v_rows };
gint i, j, k;
gint lines;
GST_DEBUG_OBJECT (dec,
"unadvantageous width or r_h, taking slow route involving memcpy");
for (i = 0; i < height; i += r_v * DCTSIZE) {
jpeg_read_raw_data (&dec->cinfo, scanarray, r_v * DCTSIZE);
for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
memcpy (base[0], y_rows[j], I420_Y_ROWSTRIDE (width));
if (base[0] < last[0])
base[0] += I420_Y_ROWSTRIDE (width);
if (r_v == 2) {
memcpy (base[0], y_rows[j + 1], I420_Y_ROWSTRIDE (width));
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, r_v * DCTSIZE);
if (G_LIKELY (lines)) {
for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
memcpy (base[0], y_rows[j], I420_Y_ROWSTRIDE (width));
if (base[0] < last[0])
base[0] += I420_Y_ROWSTRIDE (width);
}
if (G_LIKELY (r_h == 2)) {
memcpy (base[1], u_rows[k], I420_U_ROWSTRIDE (width));
memcpy (base[2], v_rows[k], I420_V_ROWSTRIDE (width));
} else if (G_UNLIKELY (r_h == 1)) {
hresamplecpy1 (base[1], u_rows[k], I420_U_ROWSTRIDE (width));
hresamplecpy1 (base[2], v_rows[k], I420_V_ROWSTRIDE (width));
} else {
/* FIXME: implement (at least we avoid crashing by doing nothing) */
}
if (G_LIKELY (r_h == 2)) {
memcpy (base[0], y_rows[j + 1], I420_Y_ROWSTRIDE (width));
if (base[0] < last[0])
base[0] += I420_Y_ROWSTRIDE (width);
}
if (G_LIKELY (r_h == 2)) {
memcpy (base[1], u_rows[k], I420_U_ROWSTRIDE (width));
memcpy (base[2], v_rows[k], I420_V_ROWSTRIDE (width));
} else if (G_UNLIKELY (r_h == 1)) {
hresamplecpy1 (base[1], u_rows[k], I420_U_ROWSTRIDE (width));
hresamplecpy1 (base[2], v_rows[k], I420_V_ROWSTRIDE (width));
} else {
/* FIXME: implement (at least we avoid crashing by doing nothing) */
}
if (r_v == 2 || (k & 1) != 0) {
if (base[1] < last[1] && base[2] < last[2]) {
base[1] += I420_U_ROWSTRIDE (width);
base[2] += I420_V_ROWSTRIDE (width);
if (r_v == 2 || (k & 1) != 0) {
if (base[1] < last[1] && base[2] < last[2]) {
base[1] += I420_U_ROWSTRIDE (width);
base[2] += I420_V_ROWSTRIDE (width);
}
}
}
} else {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
}
@ -731,6 +738,7 @@ gst_jpeg_dec_decode_direct (GstJpegDec * dec, guchar * base[3],
guchar *u[4 * DCTSIZE];
guchar *v[4 * DCTSIZE];
gint i, j, k;
gint lines;
line[0] = y;
line[1] = u;
@ -757,7 +765,10 @@ gst_jpeg_dec_decode_direct (GstJpegDec * dec, guchar * base[3],
}
}
}
jpeg_read_raw_data (&dec->cinfo, line, r_v * DCTSIZE);
lines = jpeg_read_raw_data (&dec->cinfo, line, r_v * DCTSIZE);
if (G_UNLIKELY (!lines)) {
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
}
}
}
@ -840,14 +851,13 @@ gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
GstFlowReturn ret = GST_FLOW_OK;
GstJpegDec *dec;
GstBuffer *outbuf;
gulong size;
guchar *data, *outdata;
guchar *base[3], *last[3];
guint img_len, outsize;
gint width, height;
gint r_h, r_v;
gint i;
guint code;
guint code, hdr_ok;
GstClockTime timestamp, duration;
dec = GST_JPEG_DEC (GST_PAD_PARENT (pad));
@ -909,11 +919,10 @@ gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
goto skip_decoding;
data = (guchar *) GST_BUFFER_DATA (dec->tempbuf);
size = img_len;
GST_LOG_OBJECT (dec, "image size = %u", img_len);
dec->jsrc.pub.next_input_byte = data;
dec->jsrc.pub.bytes_in_buffer = size;
dec->jsrc.pub.bytes_in_buffer = img_len;
if (setjmp (dec->jerr.setjmp_buffer)) {
code = dec->jerr.pub.msg_code;
@ -929,7 +938,10 @@ gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
data[2], data[3]);
/* read header */
jpeg_read_header (&dec->cinfo, TRUE);
hdr_ok = jpeg_read_header (&dec->cinfo, TRUE);
if (G_UNLIKELY (hdr_ok != JPEG_HEADER_OK)) {
GST_WARNING_OBJECT (dec, "reading the header failed, %d", hdr_ok);
}
r_h = dec->cinfo.cur_comp_info[0]->h_samp_factor;
r_v = dec->cinfo.cur_comp_info[0]->v_samp_factor;
@ -938,11 +950,13 @@ gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
GST_LOG_OBJECT (dec, "num_components=%d, comps_in_scan=%d",
dec->cinfo.num_components, dec->cinfo.comps_in_scan);
#ifndef GST_DISABLE_GST_DEBUG
for (i = 0; i < dec->cinfo.comps_in_scan; ++i) {
GST_LOG_OBJECT (dec, "[%d] h_samp_factor=%d, v_samp_factor=%d", i,
dec->cinfo.cur_comp_info[i]->h_samp_factor,
dec->cinfo.cur_comp_info[i]->v_samp_factor);
}
#endif
/* prepare for raw output */
dec->cinfo.do_fancy_upsampling = FALSE;
@ -953,18 +967,20 @@ gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
GST_LOG_OBJECT (dec, "starting decompress");
guarantee_huff_tables (&dec->cinfo);
jpeg_start_decompress (&dec->cinfo);
if (!jpeg_start_decompress (&dec->cinfo)) {
GST_WARNING_OBJECT (dec, "failed to start decompression cycle");
}
width = dec->cinfo.output_width;
height = dec->cinfo.output_height;
if (width < MIN_WIDTH || width > MAX_WIDTH ||
height < MIN_HEIGHT || height > MAX_HEIGHT)
if (G_UNLIKELY (width < MIN_WIDTH || width > MAX_WIDTH ||
height < MIN_HEIGHT || height > MAX_HEIGHT))
goto wrong_size;
if (width != dec->caps_width || height != dec->caps_height ||
dec->framerate_numerator != dec->caps_framerate_numerator ||
dec->framerate_denominator != dec->caps_framerate_denominator) {
if (G_UNLIKELY (width != dec->caps_width || height != dec->caps_height ||
dec->framerate_numerator != dec->caps_framerate_numerator ||
dec->framerate_denominator != dec->caps_framerate_denominator)) {
GstCaps *caps;
/* framerate == 0/1 is a still frame */
@ -1007,7 +1023,7 @@ gst_jpeg_dec_chain (GstPad * pad, GstBuffer * buf)
ret = gst_pad_alloc_buffer_and_set_caps (dec->srcpad, GST_BUFFER_OFFSET_NONE,
dec->outsize, GST_PAD_CAPS (dec->srcpad), &outbuf);
if (ret != GST_FLOW_OK)
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto alloc_failed;
outdata = GST_BUFFER_DATA (outbuf);