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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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flvmux: Write an index table to the end of the file
This commit is contained in:
Sebastian Dröge
parent
fac0992929
commit
22d95bfc09
2 changed files with 151 additions and 5 deletions
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@ -1,6 +1,6 @@
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/* GStreamer
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*
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* Copyright (c) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* Copyright (c) 2008,2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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@ -100,6 +100,18 @@ gst_flv_mux_change_state (GstElement * element, GstStateChange transition);
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static void gst_flv_mux_reset (GstElement * element);
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typedef struct
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{
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gdouble position;
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gdouble time;
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} GstFlvMuxIndexEntry;
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static void
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gst_flv_mux_index_entry_free (GstFlvMuxIndexEntry * entry)
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{
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g_slice_free (GstFlvMuxIndexEntry, entry);
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}
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static void
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gst_flv_mux_base_init (gpointer g_class)
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{
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@ -183,6 +195,11 @@ gst_flv_mux_reset (GstElement * element)
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gst_tag_list_free (mux->tags);
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mux->tags = NULL;
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g_list_foreach (mux->index, (GFunc) gst_flv_mux_index_entry_free, NULL);
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g_list_free (mux->index);
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mux->index = NULL;
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mux->byte_count = 0;
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mux->state = GST_FLV_MUX_STATE_HEADER;
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}
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@ -527,6 +544,22 @@ gst_flv_mux_release_pad (GstElement * element, GstPad * pad)
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gst_element_remove_pad (element, pad);
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}
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static GstFlowReturn
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gst_flv_mux_push (GstFlvMux * mux, GstBuffer * buffer)
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{
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mux->byte_count += GST_BUFFER_SIZE (buffer);
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if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
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GstFlvMuxIndexEntry *entry = g_slice_new (GstFlvMuxIndexEntry);
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entry->position = mux->byte_count;
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entry->time =
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gst_guint64_to_gdouble (GST_BUFFER_TIMESTAMP (buffer)) / GST_MSECOND;
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mux->index = g_list_prepend (mux->index, entry);
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}
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return gst_pad_push (mux->srcpad, buffer);
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}
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static GstFlowReturn
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gst_flv_mux_write_metadata (GstFlvMux * mux)
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{
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@ -749,7 +782,7 @@ gst_flv_mux_write_metadata (GstFlvMux * mux)
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GST_WRITE_UINT32_BE (data + 11 + 13 + 1, tags_written);
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gst_buffer_set_caps (script_tag, GST_PAD_CAPS (mux->srcpad));
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ret = gst_pad_push (mux->srcpad, script_tag);
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ret = gst_flv_mux_push (mux, script_tag);
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if (merged_tags)
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gst_tag_list_free (merged_tags);
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@ -782,7 +815,7 @@ gst_flv_mux_write_header (GstFlvMux * mux)
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GST_WRITE_UINT32_BE (data + 9, 0); /* previous tag size */
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ret = gst_pad_push (mux->srcpad, header);
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ret = gst_flv_mux_push (mux, header);
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if (ret != GST_FLOW_OK)
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return ret;
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@ -825,6 +858,7 @@ next:
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size += 4;
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tag = gst_buffer_new_and_alloc (size);
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GST_BUFFER_TIMESTAMP (tag) = timestamp * GST_MSECOND;
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data = GST_BUFFER_DATA (tag);
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memset (data, 0, size);
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@ -899,7 +933,7 @@ next:
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second_run = FALSE;
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cpad->sent_codec_data = TRUE;
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ret = gst_pad_push (mux->srcpad, tag);
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ret = gst_flv_mux_push (mux, tag);
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if (ret != GST_FLOW_OK) {
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gst_buffer_unref (buffer);
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return ret;
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@ -917,7 +951,7 @@ next:
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gst_buffer_unref (buffer);
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ret = gst_pad_push (mux->srcpad, tag);
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ret = gst_flv_mux_push (mux, tag);
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if (ret == GST_FLOW_OK)
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cpad->last_timestamp = timestamp;
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@ -925,6 +959,115 @@ next:
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return ret;
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}
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static GstFlowReturn
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gst_flv_mux_write_index (GstFlvMux * mux)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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GstBuffer *script_tag, *tmp;
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guint8 *data;
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GList *l;
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guint32 index_len;
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guint32 i, index_skip;
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if (!mux->index)
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return GST_FLOW_OK;
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script_tag = gst_buffer_new_and_alloc (11);
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data = GST_BUFFER_DATA (script_tag);
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data[0] = 18;
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/* Data size, unknown for now */
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data[1] = 0;
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data[2] = 0;
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data[3] = 0;
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/* Timestamp */
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data[4] = data[5] = data[6] = data[7] = 0;
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/* Stream ID */
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data[8] = data[9] = data[10] = 0;
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tmp = gst_buffer_new_and_alloc (13);
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data = GST_BUFFER_DATA (tmp);
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data[0] = 2; /* string */
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data[1] = 0;
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data[2] = 0x0a; /* length 10 */
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memcpy (&data[3], "onMetaData", sizeof ("onMetaData"));
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script_tag = gst_buffer_join (script_tag, tmp);
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tmp = gst_buffer_new_and_alloc (5);
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data = GST_BUFFER_DATA (tmp);
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data[0] = 8; /* ECMA array */
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GST_WRITE_UINT32_BE (data + 1, 2);
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script_tag = gst_buffer_join (script_tag, tmp);
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mux->index = g_list_reverse (mux->index);
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index_len = g_list_length (mux->index);
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/* We write at most 128 elements */
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index_skip = (index_len > 128) ? 1 + index_len / 128 : 1;
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index_len =
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(index_len <= 128) ? 1 : (index_len + index_skip - 1) / index_skip;
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tmp = gst_buffer_new_and_alloc (2 + 5 + 1 + 4 + index_len * (1 + 8));
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* 5 bytes name */
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data[1] = 5;
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memcpy (&data[2], "times", 5);
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data[7] = 10; /* array */
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GST_WRITE_UINT32_BE (&data[8], index_len);
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data += 12;
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for (i = 0, l = mux->index; l; l = l->next, i++) {
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GstFlvMuxIndexEntry *entry = l->data;
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if (i % index_skip != 0)
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continue;
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data[0] = 0;
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GST_WRITE_DOUBLE_BE (&data[1], entry->time);
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data += 9;
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}
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script_tag = gst_buffer_join (script_tag, tmp);
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tmp = gst_buffer_new_and_alloc (2 + 13 + 1 + 4 + index_len * (1 + 8));
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* 13 bytes name */
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data[1] = 13;
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memcpy (&data[2], "filepositions", 13);
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data[15] = 10; /* array */
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GST_WRITE_UINT32_BE (&data[16], index_len);
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data += 20;
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for (i = 0, l = mux->index; l; l = l->next, i++) {
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GstFlvMuxIndexEntry *entry = l->data;
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if (i % index_skip != 0)
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continue;
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data[0] = 0;
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GST_WRITE_DOUBLE_BE (&data[1], entry->position);
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data += 9;
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}
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script_tag = gst_buffer_join (script_tag, tmp);
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tmp = gst_buffer_new_and_alloc (4);
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data = GST_BUFFER_DATA (tmp);
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GST_WRITE_UINT32_BE (data, GST_BUFFER_SIZE (script_tag));
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script_tag = gst_buffer_join (script_tag, tmp);
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data = GST_BUFFER_DATA (script_tag);
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data[1] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 16) & 0xff;
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data[2] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 8) & 0xff;
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data[3] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 0) & 0xff;
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gst_buffer_set_caps (script_tag, GST_PAD_CAPS (mux->srcpad));
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ret = gst_flv_mux_push (mux, script_tag);
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return ret;
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}
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static GstFlowReturn
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gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data)
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{
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@ -994,6 +1137,7 @@ gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data)
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if (!eos && best) {
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return gst_flv_mux_write_buffer (mux, best);
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} else if (eos) {
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gst_flv_mux_write_index (mux);
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gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
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return GST_FLOW_UNEXPECTED;
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} else {
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@ -76,6 +76,8 @@ typedef struct _GstFlvMux {
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gboolean have_video;
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GstTagList *tags;
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GList *index;
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guint64 byte_count;
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} GstFlvMux;
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typedef struct _GstFlvMuxClass {
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