mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 20:21:24 +00:00
Code Issues 1 Projects Releases Wiki Activity

ext/flac/gstflacenc.*: Collect headers, add "streamheader" field to output caps and set

Browse source 
Original commit message from CVS:
* ext/flac/gstflacenc.c: (gst_flac_enc_init),
(notgst_value_array_append_buffer),
(gst_flac_enc_process_stream_headers),
(gst_flac_enc_write_callback), (gst_flac_enc_chain),
(gst_flac_enc_change_state):
* ext/flac/gstflacenc.h:
Collect headers, add "streamheader" field to output caps and set
BUFFER_IN_CAPS flag on pushed header buffers. That way oggmux
produces output according to the official FLAC-to-Ogg mapping
instead of completely broken files. Fixes #426044.
This commit is contained in:
Tim-Philipp Müller 2007-05-25 16:02:51 +00:00
parent 4a7ecfb814
commit adc1e64664
3 changed files with 185 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
ChangeLog
View file

@ -1,3 +1,16 @@
2007-05-25 Tim-Philipp Müller <tim at centricular dot net>
* ext/flac/gstflacenc.c: (gst_flac_enc_init),
(notgst_value_array_append_buffer),
(gst_flac_enc_process_stream_headers),
(gst_flac_enc_write_callback), (gst_flac_enc_chain),
(gst_flac_enc_change_state):
* ext/flac/gstflacenc.h:
Collect headers, add "streamheader" field to output caps and set
BUFFER_IN_CAPS flag on pushed header buffers. That way oggmux
produces output according to the official FLAC-to-Ogg mapping
instead of completely broken files. Fixes #426044.
2007-05-25 Jan Schmidt <thaytan@mad.scientist.com>
* gst/id3demux/gstid3demux.c: (gst_id3demux_reset),

174
ext/flac/gstflacenc.c
View file

@ -17,6 +17,11 @@
* Boston, MA 02111-1307, USA.
*/
/* FIXME:
* - we assume timestamps start from 0 and that we get a perfect stream; we
* don't handle non-zero starts and mid-stream discontinuities, esp. not if
* we're muxing into ogg
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
@ -308,6 +313,8 @@ gst_flac_enc_init (GstFlacEnc * flacenc, GstFlacEncClass * klass)
flacenc->samples_written = 0;
gst_flac_enc_update_quality (flacenc, DEFAULT_QUALITY);
flacenc->tags = gst_tag_list_new ();
flacenc->got_headers = FALSE;
flacenc->headers = NULL;
}
static void
@ -535,12 +542,134 @@ gst_flac_enc_seek_callback (const FLAC__SeekableStreamEncoder * encoder,
return FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK;
}
static void
notgst_value_array_append_buffer (GValue * array_val, GstBuffer * buf)
{
GValue value = { 0, };
g_value_init (&value, GST_TYPE_BUFFER);
/* copy buffer to avoid problems with circular refcounts */
buf = gst_buffer_copy (buf);
/* again, for good measure */
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
gst_value_set_buffer (&value, buf);
gst_buffer_unref (buf);
gst_value_array_append_value (array_val, &value);
g_value_unset (&value);
}
#define HDR_TYPE_STREAMINFO 0
#define HDR_TYPE_VORBISCOMMENT 4
static void
gst_flac_enc_process_stream_headers (GstFlacEnc * enc)
{
GstBuffer *vorbiscomment = NULL;
GstBuffer *streaminfo = NULL;
GstBuffer *marker = NULL;
GValue array = { 0, };
GstCaps *caps;
GList *l;
caps = gst_caps_new_simple ("audio/x-flac",
"channels", G_TYPE_INT, enc->channels,
"rate", G_TYPE_INT, enc->sample_rate, NULL);
for (l = enc->headers; l != NULL; l = l->next) {
const guint8 *data;
guint size;
/* mark buffers so oggmux will ignore them if it already muxed the
* header buffers from the streamheaders field in the caps */
l->data = gst_buffer_make_metadata_writable (GST_BUFFER (l->data));
GST_BUFFER_FLAG_SET (GST_BUFFER (l->data), GST_BUFFER_FLAG_IN_CAPS);
data = GST_BUFFER_DATA (GST_BUFFER_CAST (l->data));
size = GST_BUFFER_SIZE (GST_BUFFER_CAST (l->data));
/* find initial 4-byte marker which we need to skip later on */
if (size == 4 && memcmp (data, "fLaC", 4) == 0) {
marker = GST_BUFFER_CAST (l->data);
} else if (size > 1 && (data[0] & 0x7f) == HDR_TYPE_STREAMINFO) {
streaminfo = GST_BUFFER_CAST (l->data);
} else if (size > 1 && (data[0] & 0x7f) == HDR_TYPE_VORBISCOMMENT) {
vorbiscomment = GST_BUFFER_CAST (l->data);
}
}
if (marker == NULL || streaminfo == NULL || vorbiscomment == NULL) {
GST_WARNING_OBJECT (enc, "missing header %p %p %p, muxing into container "
"formats may be broken", marker, streaminfo, vorbiscomment);
goto push_headers;
}
g_value_init (&array, GST_TYPE_ARRAY);
/* add marker including STREAMINFO header */
{
GstBuffer *buf;
guint16 num;
/* minus one for the marker that is merged with streaminfo here */
num = g_list_length (enc->headers) - 1;
buf = gst_buffer_new_and_alloc (13 + GST_BUFFER_SIZE (streaminfo));
GST_BUFFER_DATA (buf)[0] = 0x7f;
memcpy (GST_BUFFER_DATA (buf) + 1, "FLAC", 4);
GST_BUFFER_DATA (buf)[5] = 0x01; /* mapping version major */
GST_BUFFER_DATA (buf)[6] = 0x00; /* mapping version minor */
GST_BUFFER_DATA (buf)[7] = (num & 0xFF00) >> 8;
GST_BUFFER_DATA (buf)[8] = (num & 0x00FF) >> 0;
memcpy (GST_BUFFER_DATA (buf) + 9, "fLaC", 4);
memcpy (GST_BUFFER_DATA (buf) + 13, GST_BUFFER_DATA (streaminfo),
GST_BUFFER_SIZE (streaminfo));
notgst_value_array_append_buffer (&array, buf);
gst_buffer_unref (buf);
}
/* add VORBISCOMMENT header */
notgst_value_array_append_buffer (&array, vorbiscomment);
/* add other headers, if there are any */
for (l = enc->headers; l != NULL; l = l->next) {
if (GST_BUFFER_CAST (l->data) != marker &&
GST_BUFFER_CAST (l->data) != streaminfo &&
GST_BUFFER_CAST (l->data) != vorbiscomment) {
notgst_value_array_append_buffer (&array, GST_BUFFER_CAST (l->data));
}
}
gst_structure_set_value (gst_caps_get_structure (caps, 0),
"streamheader", &array);
g_value_unset (&array);
push_headers:
gst_pad_set_caps (enc->srcpad, caps);
/* push header buffers; update caps, so when we push the first buffer the
* negotiated caps will change to caps that include the streamheader field */
for (l = enc->headers; l != NULL; l = l->next) {
GstBuffer *buf;
buf = GST_BUFFER (l->data);
gst_buffer_set_caps (buf, caps);
GST_LOG ("Pushing header buffer, size %u bytes", GST_BUFFER_SIZE (buf));
(void) gst_pad_push (enc->srcpad, buf);
l->data = NULL;
}
g_list_free (enc->headers);
enc->headers = NULL;
gst_caps_unref (caps);
}
static FLAC__StreamEncoderWriteStatus
gst_flac_enc_write_callback (const FLAC__SeekableStreamEncoder * encoder,
const FLAC__byte buffer[], unsigned bytes,
unsigned samples, unsigned current_frame, void *client_data)
{
GstFlowReturn ret;
GstFlowReturn ret = GST_FLOW_OK;
GstFlacEnc *flacenc;
GstBuffer *outbuf;
@ -549,36 +678,56 @@ gst_flac_enc_write_callback (const FLAC__SeekableStreamEncoder * encoder,
if (flacenc->stopped)
return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
if (gst_pad_alloc_buffer_and_set_caps (flacenc->srcpad, flacenc->offset,
bytes, GST_PAD_CAPS (flacenc->srcpad), &outbuf) != GST_FLOW_OK) {
return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
}
outbuf = gst_buffer_new_and_alloc (bytes);
memcpy (GST_BUFFER_DATA (outbuf), buffer, bytes);
if (samples > 0 && flacenc->samples_written != (guint64) - 1) {
guint64 granulepos;
GST_BUFFER_TIMESTAMP (outbuf) =
GST_FRAMES_TO_CLOCK_TIME (flacenc->samples_written,
flacenc->sample_rate);
GST_BUFFER_DURATION (outbuf) =
GST_FRAMES_TO_CLOCK_TIME (samples, flacenc->sample_rate);
/* offset_end = granulepos for ogg muxer */
GST_BUFFER_OFFSET_END (outbuf) = flacenc->samples_written + samples;
granulepos = flacenc->samples_written + samples;
GST_BUFFER_OFFSET_END (outbuf) = granulepos;
/* offset = timestamp corresponding to granulepos for ogg muxer
* (see vorbisenc for a much more elaborate version of this) */
GST_BUFFER_OFFSET (outbuf) =
GST_FRAMES_TO_CLOCK_TIME (granulepos, flacenc->sample_rate);
} else {
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
}
GST_DEBUG ("Pushing buffer: ts=%" GST_TIME_FORMAT ", samples=%u, size=%u, "
/* we assume libflac passes us stuff neatly framed */
if (!flacenc->got_headers) {
if (samples == 0) {
GST_DEBUG_OBJECT (flacenc, "Got header, queueing (%u bytes)", bytes);
flacenc->headers = g_list_append (flacenc->headers, outbuf);
/* note: it's important that we increase our byte offset */
goto out;
} else {
GST_INFO_OBJECT (flacenc, "Non-header packet, we have all headers now");
gst_flac_enc_process_stream_headers (flacenc);
flacenc->got_headers = TRUE;
}
}
GST_LOG ("Pushing buffer: ts=%" GST_TIME_FORMAT ", samples=%u, size=%u, "
"pos=%" G_GUINT64_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
samples, bytes, flacenc->offset);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (flacenc->srcpad));
ret = gst_pad_push (flacenc->srcpad, outbuf);
out:
flacenc->offset += bytes;
flacenc->samples_written += samples;
if (ret != GST_FLOW_OK && GST_FLOW_IS_FATAL (ret))
if (GST_FLOW_IS_FATAL (ret))
return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
@ -880,11 +1029,18 @@ gst_flac_enc_change_state (GstElement * element, GstStateChange transition)
}
flacenc->offset = 0;
flacenc->samples_written = 0;
flacenc->channels = 0;
flacenc->depth = 0;
flacenc->sample_rate = 0;
if (flacenc->meta) {
FLAC__metadata_object_delete (flacenc->meta[0]);
g_free (flacenc->meta);
flacenc->meta = NULL;
}
g_list_foreach (flacenc->headers, (GFunc) gst_mini_object_unref, NULL);
g_list_free (flacenc->headers);
flacenc->headers = NULL;
flacenc->got_headers = FALSE;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
default:

7
ext/flac/gstflacenc.h
View file

@ -39,7 +39,8 @@ typedef struct _GstFlacEncClass GstFlacEncClass;
struct _GstFlacEnc {
GstElement element;
GstPad *sinkpad,*srcpad;
GstPad *sinkpad;
GstPad *srcpad;
gboolean first;
GstBuffer *first_buf;
@ -58,6 +59,10 @@ struct _GstFlacEnc {
FLAC__StreamMetadata **meta;
GstTagList * tags;
/* queue headers until we have them all so we can add streamheaders to caps */
gboolean got_headers;
GList *headers;
};
struct _GstFlacEncClass {