--- a/gst_plugins_good/gst/mpegaudioparse/gstxingmux.c Tue Jul 06 14:35:10 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,681 +0,0 @@
-/*
- * Copyright (c) 2006 Christophe Fergeau <teuf@gnome.org>
- * Copyright (c) 2008 Sebastian Dröge <slomo@circular-chaos.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/* Xing SDK: http://www.mp3-tech.org/programmer/sources/vbrheadersdk.zip */
-
-
-/**
- * SECTION:element-xingmux
- *
- * xingmux adds a Xing header to MP3 files. This contains information about the duration and size
- * of the file and a seek table and is very useful for getting an almost correct duration and better
- * seeking on VBR MP3 files.
- *
- * This element will remove any existing Xing, LAME or VBRI headers from the beginning of the file.
- *
- * <refsect2>
- * <title>Example launch line</title>
- * |[
- * gst-launch audiotestsrc num-buffers=1000 ! audioconvert ! lame ! xingmux ! filesink location=test.mp3
- * gst-launch filesrc location=test.mp3 ! xingmux ! filesink location=test2.mp3
- * gst-launch filesrc location=test.mp3 ! mp3parse ! xingmux ! filesink location=test2.mp3
- * ]|
- * </refsect2>
- */
-
-#ifdef HAVE_CONFIG_H
-#include "../../config.h"
-#endif
-
-#include <string.h>
-#include "gstxingmux.h"
-
-GST_DEBUG_CATEGORY_STATIC (xing_mux_debug);
-#define GST_CAT_DEFAULT xing_mux_debug
-
-GST_BOILERPLATE (GstXingMux, gst_xing_mux, GstElement, GST_TYPE_ELEMENT);
-
-/* Xing Header stuff */
-#define GST_XING_FRAME_FIELD (1 << 0)
-#define GST_XING_BYTES_FIELD (1 << 1)
-#define GST_XING_TOC_FIELD (1 << 2)
-#define GST_XING_QUALITY_FIELD (1 << 3)
-
-typedef struct _GstXingSeekEntry
-{
- gint64 timestamp;
- gint byte;
-} GstXingSeekEntry;
-
-static inline GstXingSeekEntry *
-gst_xing_seek_entry_new ()
-{
- return g_slice_new (GstXingSeekEntry);
-}
-
-static inline void
-gst_xing_seek_entry_free (GstXingSeekEntry * entry)
-{
- g_slice_free (GstXingSeekEntry, entry);
-}
-
-static void gst_xing_mux_finalize (GObject * obj);
-static GstStateChangeReturn
-gst_xing_mux_change_state (GstElement * element, GstStateChange transition);
-static GstFlowReturn gst_xing_mux_chain (GstPad * pad, GstBuffer * buffer);
-static gboolean gst_xing_mux_sink_event (GstPad * pad, GstEvent * event);
-
-static GstStaticPadTemplate gst_xing_mux_sink_template =
-GST_STATIC_PAD_TEMPLATE ("sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("audio/mpeg, "
- "mpegversion = (int) 1, " "layer = (int) [ 1, 3 ]"));
-
-
-static GstStaticPadTemplate gst_xing_mux_src_template =
-GST_STATIC_PAD_TEMPLATE ("src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("audio/mpeg, "
- "mpegversion = (int) 1, " "layer = (int) [ 1, 3 ]"));
-static const guint mp3types_bitrates[2][3][16] = {
- {
- {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
- {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
- {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}
- },
- {
- {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
- {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
- {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}
- },
-};
-
-static const guint mp3types_freqs[3][3] = { {44100, 48000, 32000},
-{22050, 24000, 16000},
-{11025, 12000, 8000}
-};
-
-static gboolean
-parse_header (guint32 header, guint * ret_size, guint * ret_spf,
- gulong * ret_rate)
-{
- guint length, spf;
- gulong samplerate, bitrate, layer, padding;
- gint lsf, mpg25;
-
- if ((header & 0xffe00000) != 0xffe00000) {
- g_warning ("invalid sync");
- return FALSE;
- }
-
- if (((header >> 19) & 3) == 0x01) {
- g_warning ("invalid MPEG version");
- return FALSE;
- }
-
- if (((header >> 17) & 3) == 0x00) {
- g_warning ("invalid MPEG layer");
- return FALSE;
- }
-
- if (((header >> 12) & 0xf) == 0xf || ((header >> 12) & 0xf) == 0x0) {
- g_warning ("invalid bitrate");
- return FALSE;
- }
-
- if (((header >> 10) & 0x3) == 0x3) {
- g_warning ("invalid sampling rate");
- return FALSE;
- }
-
- if (header & 0x00000002) {
- g_warning ("invalid emphasis");
- return FALSE;
- }
-
- if (header & (1 << 20)) {
- lsf = (header & (1 << 19)) ? 0 : 1;
- mpg25 = 0;
- } else {
- lsf = 1;
- mpg25 = 1;
- }
-
- layer = 4 - ((header >> 17) & 0x3);
-
- bitrate = (header >> 12) & 0xF;
- bitrate = mp3types_bitrates[lsf][layer - 1][bitrate] * 1000;
- if (bitrate == 0)
- return 0;
-
- samplerate = (header >> 10) & 0x3;
- samplerate = mp3types_freqs[lsf + mpg25][samplerate];
-
- padding = (header >> 9) & 0x1;
-
- switch (layer) {
- case 1:
- length = 4 * ((bitrate * 12) / samplerate + padding);
- break;
- case 2:
- length = (bitrate * 144) / samplerate + padding;
- break;
- default:
- case 3:
- length = (bitrate * 144) / (samplerate << lsf) + padding;
- break;
- }
-
- if (layer == 1)
- spf = 384;
- else if (layer == 2 || lsf == 0)
- spf = 1152;
- else
- spf = 576;
-
- if (ret_size)
- *ret_size = length;
- if (ret_spf)
- *ret_spf = spf;
- if (ret_rate)
- *ret_rate = samplerate;
-
- return TRUE;
-}
-
-static guint
-get_xing_offset (guint32 header)
-{
- guint mpeg_version = (header >> 19) & 0x3;
- guint channel_mode = (header >> 6) & 0x3;
-
- if (mpeg_version == 0x3) {
- if (channel_mode == 0x3) {
- return 0x11;
- } else {
- return 0x20;
- }
- } else {
- if (channel_mode == 0x3) {
- return 0x09;
- } else {
- return 0x11;
- }
- }
-}
-
-static gboolean
-has_xing_header (guint32 header, guchar * data, gsize size)
-{
- data += 4;
- data += get_xing_offset (header);
-
- if (memcmp (data, "Xing", 4) == 0 ||
- memcmp (data, "Info", 4) == 0 || memcmp (data, "VBRI", 4) == 0)
- return TRUE;
- else
- return FALSE;
-}
-
-static GstBuffer *
-generate_xing_header (GstXingMux * xing)
-{
- guint8 *xing_flags;
- guint32 xing_flags_tmp = 0;
- GstBuffer *xing_header;
- guchar *data;
-
- guint32 header;
- guint32 header_be;
- guint size, spf, xing_offset;
- gulong rate;
- guint bitrate = 0x00;
-
- gint64 duration;
- gint64 byte_count;
-
- header = xing->first_header;
-
- /* Set bitrate and choose lowest possible size */
- do {
- bitrate++;
-
- header &= 0xffff0fff;
- header |= bitrate << 12;
-
- parse_header (header, &size, &spf, &rate);
- xing_offset = get_xing_offset (header);
- } while (size < (4 + xing_offset + 4 + 4 + 4 + 4 + 100) && bitrate < 0xe);
-
- if (bitrate == 0xe) {
- GST_ERROR ("No usable bitrate found!");
- return NULL;
- }
-
- if (gst_pad_alloc_buffer_and_set_caps (xing->srcpad, 0, size,
- GST_PAD_CAPS (xing->srcpad), &xing_header) != GST_FLOW_OK) {
- xing_header = gst_buffer_new_and_alloc (size);
- gst_buffer_set_caps (xing_header, GST_PAD_CAPS (xing->srcpad));
- }
-
- data = GST_BUFFER_DATA (xing_header);
- memset (data, 0, size);
- header_be = GUINT32_TO_BE (header);
- memcpy (data, &header_be, 4);
-
- data += 4;
- data += xing_offset;
-
- memcpy (data, "Xing", 4);
- data += 4;
-
- xing_flags = data;
- data += 4;
-
- if (xing->duration != GST_CLOCK_TIME_NONE) {
- duration = xing->duration;
- } else {
- GstFormat fmt = GST_FORMAT_TIME;
-
- if (!gst_pad_query_peer_duration (xing->sinkpad, &fmt, &duration))
- duration = GST_CLOCK_TIME_NONE;
- }
-
- if (duration != GST_CLOCK_TIME_NONE) {
- guint32 number_of_frames;
-
- /* The Xing Header contains a NumberOfFrames field, which verifies to:
- * Duration = NumberOfFrames *SamplesPerFrame/SamplingRate
- * SamplesPerFrame and SamplingRate are values for the current frame.
- */
- number_of_frames = gst_util_uint64_scale (duration, rate, GST_SECOND) / spf;
- GST_DEBUG ("Setting number of frames to %u", number_of_frames);
- number_of_frames = GUINT32_TO_BE (number_of_frames);
- memcpy (data, &number_of_frames, 4);
- xing_flags_tmp |= GST_XING_FRAME_FIELD;
- data += 4;
- }
-
- if (xing->byte_count != 0) {
- byte_count = xing->byte_count;
- } else {
- GstFormat fmt = GST_FORMAT_BYTES;
-
- if (!gst_pad_query_peer_duration (xing->sinkpad, &fmt, &byte_count))
- byte_count = 0;
- if (byte_count == -1)
- byte_count = 0;
- }
-
- if (byte_count != 0) {
- guint32 nbytes;
-
- if (byte_count > G_MAXUINT32) {
- GST_DEBUG ("Too large stream: %" G_GINT64_FORMAT " > %u bytes",
- byte_count, G_MAXUINT32);
- } else {
- nbytes = byte_count;
- GST_DEBUG ("Setting number of bytes to %u", nbytes);
- nbytes = GUINT32_TO_BE (nbytes);
- memcpy (data, &nbytes, 4);
- xing_flags_tmp |= GST_XING_BYTES_FIELD;
- data += 4;
- }
- }
-
- if (xing->seek_table != NULL && byte_count != 0
- && duration != GST_CLOCK_TIME_NONE) {
- GList *it;
- gint percent = 0;
-
- xing_flags_tmp |= GST_XING_TOC_FIELD;
-
- GST_DEBUG ("Writing seek table");
- for (it = xing->seek_table; it != NULL && percent < 100; it = it->next) {
- GstXingSeekEntry *entry = (GstXingSeekEntry *) it->data;
- gint64 pos;
- guchar byte;
-
- while ((entry->timestamp * 100) / duration >= percent) {
- pos = (entry->byte * 256) / byte_count;
- GST_DEBUG (" %d %% -- %" G_GINT64_FORMAT " 1/256", percent, pos);
- byte = (guchar) pos;
- memcpy (data, &byte, 1);
- data++;
- percent++;
- }
- }
-
- if (percent < 100) {
- guchar b;
- gint i;
-
- memcpy (&b, data - 1, 1);
-
- for (i = percent; i < 100; i++) {
- GST_DEBUG (" %d %% -- %d 1/256", i, b);
- memcpy (data, &b, 1);
- data++;
- }
- }
- }
-
- GST_DEBUG ("Setting Xing flags to 0x%x\n", xing_flags_tmp);
- xing_flags_tmp = GUINT32_TO_BE (xing_flags_tmp);
- memcpy (xing_flags, &xing_flags_tmp, 4);
- return xing_header;
-}
-
-static void
-gst_xing_mux_base_init (gpointer g_class)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
- static const GstElementDetails gst_xing_mux_details =
- GST_ELEMENT_DETAILS ("MP3 Xing muxer",
- "Formatter/Metadata",
- "Adds a Xing header to the beginning of a VBR MP3 file",
- "Christophe Fergeau <teuf@gnome.org>");
-
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&gst_xing_mux_src_template));
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&gst_xing_mux_sink_template));
-
- GST_DEBUG_CATEGORY_INIT (xing_mux_debug, "xingmux", 0, "Xing Header Muxer");
-
- gst_element_class_set_details (element_class, &gst_xing_mux_details);
-}
-
-static void
-gst_xing_mux_class_init (GstXingMuxClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
-
- gobject_class = (GObjectClass *) klass;
- gstelement_class = (GstElementClass *) klass;
-
- gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_xing_mux_finalize);
- gstelement_class->change_state =
- GST_DEBUG_FUNCPTR (gst_xing_mux_change_state);
-}
-
-static void
-gst_xing_mux_finalize (GObject * obj)
-{
- GstXingMux *xing = GST_XING_MUX (obj);
-
- if (xing->adapter) {
- g_object_unref (xing->adapter);
- xing->adapter = NULL;
- }
-
- if (xing->seek_table) {
- g_list_foreach (xing->seek_table, (GFunc) gst_xing_seek_entry_free, NULL);
- g_list_free (xing->seek_table);
- xing->seek_table = NULL;
- }
-
- G_OBJECT_CLASS (parent_class)->finalize (obj);
-}
-
-static void
-xing_reset (GstXingMux * xing)
-{
- xing->duration = GST_CLOCK_TIME_NONE;
- xing->byte_count = 0;
-
- gst_adapter_clear (xing->adapter);
-
- if (xing->seek_table) {
- g_list_foreach (xing->seek_table, (GFunc) gst_xing_seek_entry_free, NULL);
- g_list_free (xing->seek_table);
- xing->seek_table = NULL;
- }
-
- xing->sent_xing = FALSE;
-}
-
-
-static void
-gst_xing_mux_init (GstXingMux * xing, GstXingMuxClass * xingmux_class)
-{
- GstElementClass *klass = GST_ELEMENT_CLASS (xingmux_class);
-
- /* pad through which data comes in to the element */
- xing->sinkpad =
- gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
- "sink"), "sink");
- gst_pad_set_setcaps_function (xing->sinkpad,
- GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
- gst_pad_set_chain_function (xing->sinkpad,
- GST_DEBUG_FUNCPTR (gst_xing_mux_chain));
- gst_pad_set_event_function (xing->sinkpad,
- GST_DEBUG_FUNCPTR (gst_xing_mux_sink_event));
- gst_element_add_pad (GST_ELEMENT (xing), xing->sinkpad);
-
- /* pad through which data goes out of the element */
- xing->srcpad =
- gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
- "src"), "src");
- gst_element_add_pad (GST_ELEMENT (xing), xing->srcpad);
-
- xing->adapter = gst_adapter_new ();
-
- xing_reset (xing);
-}
-
-static GstFlowReturn
-gst_xing_mux_chain (GstPad * pad, GstBuffer * buffer)
-{
- GstXingMux *xing = GST_XING_MUX (GST_PAD_PARENT (pad));
- GstFlowReturn ret = GST_FLOW_OK;
-
- gst_adapter_push (xing->adapter, buffer);
-
- while (gst_adapter_available (xing->adapter) >= 4) {
- const guchar *data = gst_adapter_peek (xing->adapter, 4);
- guint32 header;
- GstBuffer *outbuf;
- GstClockTime duration;
- guint size, spf;
- gulong rate;
- GstXingSeekEntry *seek_entry;
-
- header = GST_READ_UINT32_BE (data);
-
- if (!parse_header (header, &size, &spf, &rate)) {
- GST_DEBUG ("Lost sync, resyncing");
- gst_adapter_flush (xing->adapter, 1);
- continue;
- }
-
- if (gst_adapter_available (xing->adapter) < size)
- break;
-
- outbuf = gst_adapter_take_buffer (xing->adapter, size);
- gst_buffer_set_caps (outbuf, GST_PAD_CAPS (xing->srcpad));
-
- if (!xing->sent_xing) {
- if (has_xing_header (header, GST_BUFFER_DATA (outbuf), size)) {
- GST_LOG_OBJECT (xing, "Dropping old Xing header");
- gst_buffer_unref (outbuf);
- continue;
- } else {
- GstBuffer *xing_header;
- guint64 xing_header_size;
-
- xing->first_header = header;
-
- xing_header = generate_xing_header (xing);
-
- if (xing_header == NULL) {
- GST_ERROR ("Can't generate Xing header");
- gst_buffer_unref (outbuf);
- return GST_FLOW_ERROR;
- }
-
- xing_header_size = GST_BUFFER_SIZE (xing_header);
-
- if (GST_FLOW_IS_FATAL (ret = gst_pad_push (xing->srcpad, xing_header))) {
- GST_ERROR_OBJECT (xing, "Failed to push Xing header: %s",
- gst_flow_get_name (ret));
- gst_buffer_unref (xing_header);
- gst_buffer_unref (outbuf);
- return ret;
- }
-
- xing->byte_count += xing_header_size;
- xing->sent_xing = TRUE;
- }
- }
-
- seek_entry = gst_xing_seek_entry_new ();
- seek_entry->timestamp =
- (xing->duration == GST_CLOCK_TIME_NONE) ? 0 : xing->duration;
- /* Workaround for parsers checking that the first seek table entry is 0 */
- seek_entry->byte = (seek_entry->timestamp == 0) ? 0 : xing->byte_count;
- xing->seek_table = g_list_append (xing->seek_table, seek_entry);
-
- duration = gst_util_uint64_scale (spf, GST_SECOND, rate);
-
- GST_BUFFER_TIMESTAMP (outbuf) =
- (xing->duration == GST_CLOCK_TIME_NONE) ? 0 : xing->duration;
- GST_BUFFER_DURATION (outbuf) = duration;
- GST_BUFFER_OFFSET (outbuf) = xing->byte_count;
- GST_BUFFER_OFFSET_END (outbuf) =
- xing->byte_count + GST_BUFFER_SIZE (outbuf);
-
- xing->byte_count += GST_BUFFER_SIZE (outbuf);
-
- if (xing->duration == GST_CLOCK_TIME_NONE)
- xing->duration = duration;
- else
- xing->duration += duration;
-
- if (GST_FLOW_IS_FATAL (ret = gst_pad_push (xing->srcpad, outbuf))) {
- GST_ERROR_OBJECT (xing, "Failed to push MP3 frame: %s",
- gst_flow_get_name (ret));
- return ret;
- }
- }
-
- return ret;
-}
-
-static gboolean
-gst_xing_mux_sink_event (GstPad * pad, GstEvent * event)
-{
- GstXingMux *xing;
- gboolean result;
-
- xing = GST_XING_MUX (gst_pad_get_parent (pad));
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_NEWSEGMENT:
- if (xing->sent_xing) {
- GST_ERROR ("Already sent Xing header, dropping NEWSEGMENT event!");
- gst_event_unref (event);
- result = FALSE;
- } else {
- GstFormat fmt;
-
- gst_event_parse_new_segment (event, NULL, NULL, &fmt, NULL, NULL, NULL);
-
- if (fmt == GST_FORMAT_BYTES) {
- result = gst_pad_push_event (xing->srcpad, event);
- } else {
- gst_event_unref (event);
-
- event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
- 0, GST_CLOCK_TIME_NONE, 0);
-
- result = gst_pad_push_event (xing->srcpad, event);
- }
- }
- break;
-
- case GST_EVENT_EOS:{
- GstEvent *n_event;
-
- GST_DEBUG_OBJECT (xing, "handling EOS event");
-
- if (xing->sent_xing) {
-
- n_event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
- 0, GST_CLOCK_TIME_NONE, 0);
-
- if (G_UNLIKELY (!gst_pad_push_event (xing->srcpad, n_event))) {
- GST_WARNING
- ("Failed to seek to position 0 for pushing the Xing header");
- } else {
- GstBuffer *header;
- GstFlowReturn ret;
-
- header = generate_xing_header (xing);
-
- if (header == NULL) {
- GST_ERROR ("Can't generate Xing header");
- } else {
-
- GST_INFO ("Writing real Xing header to beginning of stream");
-
- if (GST_FLOW_IS_FATAL (ret = gst_pad_push (xing->srcpad, header)))
- GST_WARNING ("Failed to push updated Xing header: %s\n",
- gst_flow_get_name (ret));
- }
- }
- }
- result = gst_pad_push_event (xing->srcpad, event);
- break;
- }
- default:
- result = gst_pad_event_default (pad, event);
- break;
- }
- gst_object_unref (GST_OBJECT (xing));
-
- return result;
-}
-
-
-static GstStateChangeReturn
-gst_xing_mux_change_state (GstElement * element, GstStateChange transition)
-{
- GstXingMux *xing;
- GstStateChangeReturn result;
-
- xing = GST_XING_MUX (element);
-
- result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- xing_reset (xing);
- break;
- default:
- break;
- }
-
- return result;
-}