diff options
Diffstat (limited to 'gst-libs/gst/riff/riffencode.c')
| -rw-r--r-- | gst-libs/gst/riff/riffencode.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/gst-libs/gst/riff/riffencode.c b/gst-libs/gst/riff/riffencode.c new file mode 100644 index 00000000..a6caed9e --- /dev/null +++ b/gst-libs/gst/riff/riffencode.c @@ -0,0 +1,177 @@ +/* Gnome-Streamer + * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> + * + * 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. + */ + +#include <string.h> + +//#define DEBUG_ENABLED +#include "riff.h" + +#define GST_RIFF_ENCODER_BUF_SIZE 1024 + +#define ADD_CHUNK(riffenc, chunkid, chunksize) \ +{ \ + gst_riff_chunk *chunk;\ + chunk = (gst_riff_chunk *)(riffenc->dataleft + riffenc->nextlikely);\ + chunk->id = chunkid; \ + chunk->size = chunksize; \ + riffenc->nextlikely += sizeof(gst_riff_chunk); \ +} + +#define ADD_LIST(riffenc, listsize, listtype) \ +{ \ + gst_riff_list *list;\ + list = (gst_riff_list *)(riffenc->dataleft + riffenc->nextlikely); \ + list->id = GST_RIFF_TAG_LIST; \ + list->size = listsize; \ + list->type = listtype; \ + riffenc->nextlikely += sizeof(gst_riff_list); \ +} + + +GstRiff *gst_riff_encoder_new(guint32 type) { + GstRiff *riff; + gst_riff_list *list; + + GST_DEBUG (0,"gst_riff_encoder: making %4.4s encoder\n", (char *)&type); + riff = (GstRiff *)g_malloc(sizeof(GstRiff)); + g_return_val_if_fail(riff != NULL, NULL); + + riff->form = 0; + riff->chunks = NULL; + riff->state = GST_RIFF_STATE_INITIAL; + riff->curoffset = 0; + riff->incomplete_chunk = NULL; + riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE); + riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE; + riff->nextlikely = 0; + + list = (gst_riff_list *)riff->dataleft; + list->id = GST_RIFF_TAG_RIFF; + list->size = 0x00FFFFFF; + list->type = GST_RIFF_RIFF_AVI; + + riff->nextlikely += sizeof(gst_riff_list); + + return riff; +} + +gint gst_riff_encoder_avih(GstRiff *riff, gst_riff_avih *head, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_INITIAL, GST_RIFF_EINVAL); + + GST_DEBUG (0,"gst_riff_encoder: add avih\n"); + + ADD_LIST(riff, 0xB8, GST_RIFF_LIST_hdrl); + + ADD_CHUNK(riff, GST_RIFF_TAG_avih, size); + + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + memcpy(chunk, head, size); + riff->nextlikely += size; + + riff->state = GST_RIFF_STATE_HASAVIH; + return GST_RIFF_OK; +} + +gint gst_riff_encoder_strh(GstRiff *riff, guint32 fcc_type, gst_riff_strh *head, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASAVIH || + riff->state == GST_RIFF_STATE_HASSTRF, GST_RIFF_EINVAL); + + GST_DEBUG (0,"gst_riff_encoder: add strh type %08x (%4.4s)\n", fcc_type, (char *)&fcc_type); + + ADD_LIST(riff, 108, GST_RIFF_LIST_strl); + + ADD_CHUNK(riff, GST_RIFF_TAG_strh, size); + + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + head->type = fcc_type; + memcpy(chunk, head, size); + + riff->nextlikely += size; + + riff->state = GST_RIFF_STATE_HASSTRH; + return GST_RIFF_OK; +} + +gint gst_riff_encoder_strf(GstRiff *riff, void *format, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRH, GST_RIFF_EINVAL); + + GST_DEBUG (0,"gst_riff_encoder: add strf\n"); + + ADD_CHUNK(riff, GST_RIFF_TAG_strf, size); + + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + memcpy(chunk, format, size); + riff->nextlikely += size; + + riff->state = GST_RIFF_STATE_HASSTRF; + return GST_RIFF_OK; +} + +gint gst_riff_encoder_chunk(GstRiff *riff, guint32 chunk_type, void *chunkdata, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRF || + riff->state == GST_RIFF_STATE_MOVI, GST_RIFF_EINVAL); + + if (riff->state != GST_RIFF_STATE_MOVI) { + ADD_LIST(riff, 0x00FFFFFF, GST_RIFF_LIST_movi); + riff->state = GST_RIFF_STATE_MOVI; + } + + GST_DEBUG (0,"gst_riff_encoder: add chunk type %08x (%4.4s)\n", chunk_type, (char *)&chunk_type); + + ADD_CHUNK(riff, chunk_type, size); + + if (chunkdata != NULL) { + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + memcpy(chunk, chunkdata, size); + riff->nextlikely += size + (size&1); + } + + return GST_RIFF_OK; +} + +GstBuffer *gst_riff_encoder_get_buffer(GstRiff *riff) { + GstBuffer *newbuf; + + newbuf = gst_buffer_new(); + GST_BUFFER_DATA(newbuf) = riff->dataleft; + GST_BUFFER_SIZE(newbuf) = riff->nextlikely; + + return newbuf; +} + +GstBuffer *gst_riff_encoder_get_and_reset_buffer(GstRiff *riff) { + GstBuffer *newbuf; + + newbuf = gst_riff_encoder_get_buffer(riff); + + riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE); + riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE; + riff->nextlikely = 0; + + return newbuf; +} + |