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theoraenc: Implement two pass encoding

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Fixes bug #621349.
This commit is contained in:
Sebastian Dröge 2010-07-04 20:29:53 +02:00
parent 5318e71b4d
commit c95d0034af
3 changed files with 263 additions and 2 deletions
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3
ext/theora/Makefile.am
View file

@ -9,10 +9,11 @@ libgsttheora_la_SOURCES = gsttheora.c \
gsttheoradec.c \
gsttheoraparse.c
libgsttheora_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) $(THEORA_CFLAGS)
libgsttheora_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS) $(THEORA_CFLAGS)
libgsttheora_la_LIBADD = \
$(top_builddir)/gst-libs/gst/tag/libgsttag-$(GST_MAJORMINOR).la \
$(top_builddir)/gst-libs/gst/video/libgstvideo-$(GST_MAJORMINOR).la \
$(GST_BASE_LIBS) \
$(GST_LIBS) \
$(THEORA_LIBS)
libgsttheora_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)

242
ext/theora/gsttheoraenc.c
View file

@ -85,6 +85,25 @@ gst_border_mode_get_type (void)
return border_mode_type;
}
#define GST_TYPE_MULTIPASS_MODE (gst_multipass_mode_get_type())
static GType
gst_multipass_mode_get_type (void)
{
static GType multipass_mode_type = 0;
static const GEnumValue multipass_mode[] = {
{MULTIPASS_MODE_SINGLE_PASS, "Single pass", "single-pass"},
{MULTIPASS_MODE_FIRST_PASS, "First pass", "first-pass"},
{MULTIPASS_MODE_SECOND_PASS, "Second pass", "second-pass"},
{0, NULL, NULL},
};
if (!multipass_mode_type) {
multipass_mode_type =
g_enum_register_static ("GstTheoraEncMultipassMode", multipass_mode);
}
return multipass_mode_type;
}
/* taken from theora/lib/toplevel.c */
static int
_ilog (unsigned int v)
@ -109,6 +128,8 @@ _ilog (unsigned int v)
#define THEORA_DEF_CAP_OVERFLOW TRUE
#define THEORA_DEF_CAP_UNDERFLOW FALSE
#define THEORA_DEF_RATE_BUFFER 0
#define THEORA_DEF_MULTIPASS_CACHE_FILE NULL
#define THEORA_DEF_MULTIPASS_MODE MULTIPASS_MODE_SINGLE_PASS
enum
{
PROP_0,
@ -130,7 +151,9 @@ enum
PROP_CAP_OVERFLOW,
PROP_CAP_UNDERFLOW,
PROP_RATE_BUFFER,
/* FILL ME */
PROP_MULTIPASS_CACHE_FILE,
PROP_MULTIPASS_MODE
/* FILL ME */
};
/* this function does a straight granulepos -> timestamp conversion */
@ -312,6 +335,15 @@ gst_theora_enc_class_init (GstTheoraEncClass * klass)
" This property requires libtheora version >= 1.1",
0, 1000, THEORA_DEF_RATE_BUFFER,
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MULTIPASS_CACHE_FILE,
g_param_spec_string ("multipass-cache-file", "Multipass Cache File",
"Multipass cache file", THEORA_DEF_MULTIPASS_CACHE_FILE,
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MULTIPASS_MODE,
g_param_spec_enum ("multipass-mode", "Multipass mode",
"Single pass or first/second pass", GST_TYPE_MULTIPASS_MODE,
THEORA_DEF_MULTIPASS_MODE,
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state = theora_enc_change_state;
GST_DEBUG_CATEGORY_INIT (theoraenc_debug, "theoraenc", 0, "Theora encoder");
@ -349,6 +381,24 @@ gst_theora_enc_init (GstTheoraEnc * enc, GstTheoraEncClass * g_class)
enc->cap_overflow = THEORA_DEF_CAP_OVERFLOW;
enc->cap_underflow = THEORA_DEF_CAP_UNDERFLOW;
enc->rate_buffer = THEORA_DEF_RATE_BUFFER;
enc->multipass_mode = THEORA_DEF_MULTIPASS_MODE;
enc->multipass_cache_file = THEORA_DEF_MULTIPASS_CACHE_FILE;
}
static void
theora_enc_clear_multipass_cache (GstTheoraEnc * enc)
{
if (enc->multipass_cache_fd) {
g_io_channel_shutdown (enc->multipass_cache_fd, TRUE, NULL);
g_io_channel_unref (enc->multipass_cache_fd);
enc->multipass_cache_fd = NULL;
}
if (enc->multipass_cache_adapter) {
gst_object_unref (enc->multipass_cache_adapter);
enc->multipass_cache_adapter = NULL;
}
}
static void
@ -361,10 +411,51 @@ theora_enc_finalize (GObject * object)
th_encode_free (enc->encoder);
th_comment_clear (&enc->comment);
th_info_clear (&enc->info);
g_free (enc->multipass_cache_file);
theora_enc_clear_multipass_cache (enc);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
theora_enc_write_multipass_cache_beginning (GstTheoraEnc * enc, gboolean eos)
{
GError *err = NULL;
GIOStatus stat;
gint bytes_read = 0;
gsize bytes_written = 0;
gchar *buf;
stat =
g_io_channel_seek_position (enc->multipass_cache_fd, 0, G_SEEK_SET, &err);
if (stat != G_IO_STATUS_ERROR) {
do {
bytes_read =
th_encode_ctl (enc->encoder, TH_ENCCTL_2PASS_OUT, &buf, sizeof (buf));
if (bytes_read > 0)
g_io_channel_write_chars (enc->multipass_cache_fd, buf, bytes_read,
&bytes_written, NULL);
} while (bytes_read > 0 && bytes_written > 0);
}
if (stat == G_IO_STATUS_ERROR || bytes_read < 0 || bytes_written < 0) {
if (eos)
GST_ELEMENT_WARNING (enc, RESOURCE, WRITE, (NULL),
("Failed to seek to beginning of multipass cache file: %s",
err->message));
else
GST_ELEMENT_ERROR (enc, RESOURCE, WRITE, (NULL),
("Failed to seek to beginning of multipass cache file: %s",
err->message));
g_error_free (err);
return FALSE;
}
return TRUE;
}
static void
theora_enc_reset (GstTheoraEnc * enc)
{
@ -402,6 +493,11 @@ theora_enc_reset (GstTheoraEnc * enc)
enc->keyframe_force : enc->keyframe_freq;
th_encode_ctl (enc->encoder, TH_ENCCTL_SET_KEYFRAME_FREQUENCY_FORCE,
&keyframe_force, sizeof (keyframe_force));
/* Get placeholder data */
if (enc->multipass_cache_fd
&& enc->multipass_mode == MULTIPASS_MODE_FIRST_PASS)
theora_enc_write_multipass_cache_beginning (enc, FALSE);
}
static void
@ -736,6 +832,12 @@ theora_enc_sink_event (GstPad * pad, GstEvent * event)
enc->next_ts = next_time;
}
}
if (enc->initialised && enc->multipass_cache_fd
&& enc->multipass_mode == MULTIPASS_MODE_FIRST_PASS)
theora_enc_write_multipass_cache_beginning (enc, TRUE);
theora_enc_clear_multipass_cache (enc);
res = gst_pad_push_event (enc->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
@ -866,6 +968,79 @@ theora_enc_init_buffer (th_ycbcr_buffer buf, th_info * info, guint8 * data)
}
}
static gboolean
theora_enc_read_multipass_cache (GstTheoraEnc * enc)
{
GstBuffer *cache_buf;
const guint8 *cache_data;
gsize bytes_read = 0, bytes_consumed = 0;
GIOStatus stat = G_IO_STATUS_NORMAL;
gboolean done = FALSE;
while (!done) {
if (gst_adapter_available (enc->multipass_cache_adapter) == 0) {
cache_buf = gst_buffer_new_and_alloc (512);
stat = g_io_channel_read_chars (enc->multipass_cache_fd,
(gchar *) GST_BUFFER_DATA (cache_buf), GST_BUFFER_SIZE (cache_buf),
&bytes_read, NULL);
if (bytes_read <= 0) {
gst_buffer_unref (cache_buf);
break;
} else {
GST_BUFFER_SIZE (cache_buf) = bytes_read;
gst_adapter_push (enc->multipass_cache_adapter, cache_buf);
}
}
if (gst_adapter_available (enc->multipass_cache_adapter) == 0)
break;
bytes_read =
MIN (gst_adapter_available (enc->multipass_cache_adapter), 512);
cache_data = gst_adapter_peek (enc->multipass_cache_adapter, bytes_read);
bytes_consumed =
th_encode_ctl (enc->encoder, TH_ENCCTL_2PASS_IN, (guint8 *) cache_data,
bytes_read);
done = bytes_consumed <= 0;
if (bytes_consumed > 0)
gst_adapter_flush (enc->multipass_cache_adapter, bytes_consumed);
}
if (stat == G_IO_STATUS_ERROR || (stat == G_IO_STATUS_EOF && bytes_read == 0)
|| bytes_consumed < 0) {
GST_ELEMENT_ERROR (enc, RESOURCE, READ, (NULL),
("Failed to read multipass cache file"));
return FALSE;
}
return TRUE;
}
static gboolean
theora_enc_write_multipass_cache (GstTheoraEnc * enc)
{
gchar *buf;
gint bytes_read;
gsize bytes_written = 0;
do {
bytes_read =
th_encode_ctl (enc->encoder, TH_ENCCTL_2PASS_OUT, &buf, sizeof (buf));
if (bytes_read > 0)
g_io_channel_write_chars (enc->multipass_cache_fd, buf, bytes_read,
&bytes_written, NULL);
} while (bytes_read > 0 && bytes_written > 0);
if (bytes_read < 0 || bytes_written < 0) {
GST_ELEMENT_ERROR (enc, RESOURCE, WRITE, (NULL),
("Failed to write multipass cache file"));
return FALSE;
}
return TRUE;
}
static GstFlowReturn
theora_enc_chain (GstPad * pad, GstBuffer * buffer)
{
@ -1010,10 +1185,26 @@ theora_enc_chain (GstPad * pad, GstBuffer * buffer)
enc->next_discont = TRUE;
}
if (enc->multipass_cache_fd
&& enc->multipass_mode == MULTIPASS_MODE_SECOND_PASS) {
if (!theora_enc_read_multipass_cache (enc)) {
ret = GST_FLOW_ERROR;
goto multipass_read_failed;
}
}
res = th_encode_ycbcr_in (enc->encoder, ycbcr);
/* none of the failure cases can happen here */
g_assert (res == 0);
if (enc->multipass_cache_fd
&& enc->multipass_mode == MULTIPASS_MODE_FIRST_PASS) {
if (!theora_enc_write_multipass_cache (enc)) {
ret = GST_FLOW_ERROR;
goto multipass_write_failed;
}
}
ret = GST_FLOW_OK;
while (th_encode_packetout (enc->encoder, 0, &op)) {
GstClockTime next_time;
@ -1034,6 +1225,16 @@ theora_enc_chain (GstPad * pad, GstBuffer * buffer)
return ret;
/* ERRORS */
multipass_read_failed:
{
gst_buffer_unref (buffer);
return ret;
}
multipass_write_failed:
{
gst_buffer_unref (buffer);
return ret;
}
header_buffer_alloc:
{
gst_buffer_unref (buffer);
@ -1075,6 +1276,33 @@ theora_enc_change_state (GstElement * element, GstStateChange transition)
th_comment_init (&enc->comment);
enc->packetno = 0;
enc->force_keyframe = FALSE;
if (enc->multipass_mode >= MULTIPASS_MODE_FIRST_PASS) {
GError *err = NULL;
if (!enc->multipass_cache_file) {
ret = GST_STATE_CHANGE_FAILURE;
GST_ELEMENT_ERROR (enc, LIBRARY, SETTINGS, (NULL), (NULL));
return ret;
}
enc->multipass_cache_fd =
g_io_channel_new_file (enc->multipass_cache_file,
(enc->multipass_mode == MULTIPASS_MODE_FIRST_PASS ? "w" : "r"),
&err);
if (enc->multipass_mode == MULTIPASS_MODE_SECOND_PASS)
enc->multipass_cache_adapter = gst_adapter_new ();
if (!enc->multipass_cache_fd) {
ret = GST_STATE_CHANGE_FAILURE;
GST_ELEMENT_ERROR (enc, RESOURCE, OPEN_READ, (NULL),
("Failed to open multipass cache file: %s", err->message));
g_error_free (err);
return ret;
}
g_io_channel_set_encoding (enc->multipass_cache_fd, NULL, NULL);
}
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
@ -1159,6 +1387,12 @@ theora_enc_set_property (GObject * object, guint prop_id,
case PROP_RATE_BUFFER:
enc->rate_buffer = g_value_get_int (value);
break;
case PROP_MULTIPASS_CACHE_FILE:
enc->multipass_cache_file = g_value_dup_string (value);
break;
case PROP_MULTIPASS_MODE:
enc->multipass_mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1226,6 +1460,12 @@ theora_enc_get_property (GObject * object, guint prop_id,
case PROP_RATE_BUFFER:
g_value_set_int (value, enc->rate_buffer);
break;
case PROP_MULTIPASS_CACHE_FILE:
g_value_set_string (value, enc->multipass_cache_file);
break;
case PROP_MULTIPASS_MODE:
g_value_set_enum (value, enc->multipass_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

20
ext/theora/gsttheoraenc.h
View file

@ -21,6 +21,7 @@
#define __GST_THEORAENC_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <theora/theoraenc.h>
G_BEGIN_DECLS
@ -55,6 +56,20 @@ typedef enum
}
GstTheoraEncBorderMode;
/**
* GstTheoraEncMultipassMode:
* @MULTIPASS_MODE_SINGLE_PASS: Single pass encoding
* @MULTIPASS_MODE_FIRST_PASS: First pass of two pass encoding
* @MULTIPASS_MODE_SECOND_PASS: Second pass of two pass encoding
*
*/
typedef enum
{
MULTIPASS_MODE_SINGLE_PASS,
MULTIPASS_MODE_FIRST_PASS,
MULTIPASS_MODE_SECOND_PASS
} GstTheoraEncMultipassMode;
/**
* GstTheoraEnc:
*
@ -103,6 +118,11 @@ struct _GstTheoraEnc
gboolean cap_overflow;
gboolean cap_underflow;
int rate_buffer;
GstTheoraEncMultipassMode multipass_mode;
GIOChannel *multipass_cache_fd;
GstAdapter *multipass_cache_adapter;
gchar *multipass_cache_file;
};
struct _GstTheoraEncClass