a6caed9ee54af7f1e56d3bba441a77bfb83ba47b
1 /* Gnome-Streamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
20 #include <string.h>
22 //#define DEBUG_ENABLED
23 #include "riff.h"
25 #define GST_RIFF_ENCODER_BUF_SIZE 1024
27 #define ADD_CHUNK(riffenc, chunkid, chunksize) \
28 { \
29 gst_riff_chunk *chunk;\
30 chunk = (gst_riff_chunk *)(riffenc->dataleft + riffenc->nextlikely);\
31 chunk->id = chunkid; \
32 chunk->size = chunksize; \
33 riffenc->nextlikely += sizeof(gst_riff_chunk); \
34 }
36 #define ADD_LIST(riffenc, listsize, listtype) \
37 { \
38 gst_riff_list *list;\
39 list = (gst_riff_list *)(riffenc->dataleft + riffenc->nextlikely); \
40 list->id = GST_RIFF_TAG_LIST; \
41 list->size = listsize; \
42 list->type = listtype; \
43 riffenc->nextlikely += sizeof(gst_riff_list); \
44 }
47 GstRiff *gst_riff_encoder_new(guint32 type) {
48 GstRiff *riff;
49 gst_riff_list *list;
51 GST_DEBUG (0,"gst_riff_encoder: making %4.4s encoder\n", (char *)&type);
52 riff = (GstRiff *)g_malloc(sizeof(GstRiff));
53 g_return_val_if_fail(riff != NULL, NULL);
55 riff->form = 0;
56 riff->chunks = NULL;
57 riff->state = GST_RIFF_STATE_INITIAL;
58 riff->curoffset = 0;
59 riff->incomplete_chunk = NULL;
60 riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE);
61 riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE;
62 riff->nextlikely = 0;
64 list = (gst_riff_list *)riff->dataleft;
65 list->id = GST_RIFF_TAG_RIFF;
66 list->size = 0x00FFFFFF;
67 list->type = GST_RIFF_RIFF_AVI;
69 riff->nextlikely += sizeof(gst_riff_list);
71 return riff;
72 }
74 gint gst_riff_encoder_avih(GstRiff *riff, gst_riff_avih *head, gulong size) {
75 gst_riff_chunk *chunk;
77 g_return_val_if_fail(riff->state == GST_RIFF_STATE_INITIAL, GST_RIFF_EINVAL);
79 GST_DEBUG (0,"gst_riff_encoder: add avih\n");
81 ADD_LIST(riff, 0xB8, GST_RIFF_LIST_hdrl);
83 ADD_CHUNK(riff, GST_RIFF_TAG_avih, size);
85 chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
86 memcpy(chunk, head, size);
87 riff->nextlikely += size;
89 riff->state = GST_RIFF_STATE_HASAVIH;
90 return GST_RIFF_OK;
91 }
93 gint gst_riff_encoder_strh(GstRiff *riff, guint32 fcc_type, gst_riff_strh *head, gulong size) {
94 gst_riff_chunk *chunk;
96 g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASAVIH ||
97 riff->state == GST_RIFF_STATE_HASSTRF, GST_RIFF_EINVAL);
99 GST_DEBUG (0,"gst_riff_encoder: add strh type %08x (%4.4s)\n", fcc_type, (char *)&fcc_type);
101 ADD_LIST(riff, 108, GST_RIFF_LIST_strl);
103 ADD_CHUNK(riff, GST_RIFF_TAG_strh, size);
105 chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
106 head->type = fcc_type;
107 memcpy(chunk, head, size);
109 riff->nextlikely += size;
111 riff->state = GST_RIFF_STATE_HASSTRH;
112 return GST_RIFF_OK;
113 }
115 gint gst_riff_encoder_strf(GstRiff *riff, void *format, gulong size) {
116 gst_riff_chunk *chunk;
118 g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRH, GST_RIFF_EINVAL);
120 GST_DEBUG (0,"gst_riff_encoder: add strf\n");
122 ADD_CHUNK(riff, GST_RIFF_TAG_strf, size);
124 chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
125 memcpy(chunk, format, size);
126 riff->nextlikely += size;
128 riff->state = GST_RIFF_STATE_HASSTRF;
129 return GST_RIFF_OK;
130 }
132 gint gst_riff_encoder_chunk(GstRiff *riff, guint32 chunk_type, void *chunkdata, gulong size) {
133 gst_riff_chunk *chunk;
135 g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRF ||
136 riff->state == GST_RIFF_STATE_MOVI, GST_RIFF_EINVAL);
138 if (riff->state != GST_RIFF_STATE_MOVI) {
139 ADD_LIST(riff, 0x00FFFFFF, GST_RIFF_LIST_movi);
140 riff->state = GST_RIFF_STATE_MOVI;
141 }
143 GST_DEBUG (0,"gst_riff_encoder: add chunk type %08x (%4.4s)\n", chunk_type, (char *)&chunk_type);
145 ADD_CHUNK(riff, chunk_type, size);
147 if (chunkdata != NULL) {
148 chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely);
149 memcpy(chunk, chunkdata, size);
150 riff->nextlikely += size + (size&1);
151 }
153 return GST_RIFF_OK;
154 }
156 GstBuffer *gst_riff_encoder_get_buffer(GstRiff *riff) {
157 GstBuffer *newbuf;
159 newbuf = gst_buffer_new();
160 GST_BUFFER_DATA(newbuf) = riff->dataleft;
161 GST_BUFFER_SIZE(newbuf) = riff->nextlikely;
163 return newbuf;
164 }
166 GstBuffer *gst_riff_encoder_get_and_reset_buffer(GstRiff *riff) {
167 GstBuffer *newbuf;
169 newbuf = gst_riff_encoder_get_buffer(riff);
171 riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE);
172 riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE;
173 riff->nextlikely = 0;
175 return newbuf;
176 }